Here is a detailed description of the "Weather Center":

NHRA & IHRA Contingency item!
Motor sports most accurate and only patented weather station the PerformAIRE air quality computer is now available as a trailer mounted version -The PerformAIRE WEATHER CENTER. This system uses a remote sensor housing that can be located outside the trailer in the open air. The sensor housing is an aluminum white powder coated extrusion. Dual internal fans keeps fresh air moving though the housing for accurate air measurements. The Control Console can be mounted inside the trailer where run and weather data can be entered and monitored using a data entry keypad and backlit LCD display.

*****NEW feature (at your request); WATER GRAINS*****
The PerformAIRE WEATHER CENTER monitors the Temperature, Absolute Barometric Pressure, Relative Humidity, Vapor Pressure, Dew Point, WATER GRAINS, % Oxygen (Optional), Wind Speed, Wind Gust, and Wind Direction (all optional) through its state of the art electronic sensors. This information is transmitted into a microprocessor where density altitude, oxygen altitude, and predicted values are calculated and displayed to incredible accuracy through exact scientific equations formulated specifically for internal combustion engines (verified by authorities in atmospheric research).

Without the need of having a personal computer in your trailer the PerformAIRE WEATHER CENTER can send complete weather and prediction information to you anywhere at the track, including the staging lanes! Multiple pagers can be ran off the system and predictions can be sent for multiple cars. Paging range is 1 mile (minimum). There are also no service fees. This is a stand alone system!

The PerformAIRE WEATHER CENTER contains a data base that allows for storage of runs and then uses this data to automatically predict ETs, Throttle Stop Settings, Jet Sizes, etc. The predicted values are continually updated with each new sample of air. The density altitude and oxygen altitude will automatically be stored with each run if an oxygen sensor has been installed. The stored runs are also tagged with a time and date stamp to allow for later referencing. The expandable data base is capable of storing hundreds of runs and will allow those runs to be stored in separate data bases, which can be labeled for specific cars or tracks. A Personal Computer is NOT needed. "Altalab's Altacom II Weather System":

PRICES TOO LOW TO ADVERTISE!! This item can not be ordered on line, Please call Sal, Pete, or Richie for pricing and ordering at 732-683-0404. We have a LOW package price on the "Altacom II", complete with a magnetic mount antenna , and the most popular options, which are the Paging option (with one pager), and the Wind Monitoring Option, (as shown in photo). For easy reference our Part Number on the complete package is #AC2L-W. And yes, since many people ask...This unit does provide

Other Available Options and / or add-ons:

Here is a detailed description of the "ALTACOM II With Wind" (Part #AC2L-W):
AltaCom II is designed for superior in-field operation. From sensor specifications and board design, to the remote sensing, paging functions, and software, every choice has been made to provide you with stable, accurate readings you can rely on. All that is included in the package price.

AltaCom II is an excellent weatherstation for tuning, racing and dyno work. The fan-aspirated remote sensor housing can be mounted above the trailer roof or in the plenum. The remote cable permits flexible setup, with the console located for convenient viewing. The LCD on the console updates every 20 seconds. The console logs data to internal memory, and can be connected to a PC with the included serial cable for downloading and live data display on screen.

AltaCom II can function as a stand alone weather station, but added functionality is available through your PC. Merlin Windows software provides communications between the weatherstation and your computer, and has powerful tools for drag racing predictions:

CLICK HERE for more features and specs on the Altacom II.

Part: ALB-PGA	Altacom II - Pager	Price: $190	Weight: 1 lbs.
Altacom II Option - Digital Pager - This pager was chosen for its durability and excellent reception at the track. Easy to read and use. Each Pager is programmed to match your weatherstation. Features include a backlight, holster with protective LCD cover, message storage and message locking features. One pager comes standard with AltaCom II, keep the extra as a spare, to run two cars, or to loan to a friend. Or, buy a spare with a friend, and split the cost of the system.
Part: ALB-J10	Altacom II - Trailer Connector	Price: $94.99	Weight: 1 lbs.
Altacom II Option - Indoor / Outdoor Weather proof connector faciliates remote sensor assembly in large trailers. It mounts in side of trailer and allows for cable from sensor housing to be easily plugged in. Comes with 10' length of cable for outside connection. Left photo shows the front of the connection, and the right photo shows the back (which would be inside the trailer).
Part: ALB-J20	Altacom II - Trailer Conn + Ant	Price: $154.99	Weight: 1 lbs.
Altacom II Option - Same as above with an antenna connection built in.
Part: ALB-PMA-36	Altacom II - Perm Mt upgrade	Price: $47.00	Weight: 2 lbs.
Altacom II Option - Upgrade - Permanent Mount Antenna can increase paging distance, and can be substituted for the standard magnetic mount antenna for the price shown
Part: ALB-PMA-37	Altacom II - Perm Mount	Price: $80.00	Weight: 2 lbs.
Altacom II Option - Permanent Mount Antenna can increase paging distance.
Part: ALB-MOUNT-BRKT	Altacom II - Mount Bracket	Price: $54.00	Weight: 2 lbs.
Altacom II Option - Console Mounting Bracket. Keep counters clear and weather readings comfortably at eye level with this very nicely made stainless steel bracket with front and rear lip. It allows you to secure the console safely under an overhead cabinet.
Part: ALB-MC	Altacom II - Clamps	Price: $20.00	Weight: 1 lbs.
Altacom II Option - Set of 2 Pole Mounting Clamps. High strength polypropylene quick release clamps to easily fasten your 7/8" OD pole to your trailer. These are very nicely made with stainless steel fittings and a rubber grommet to prevent pole slippage
Part: ALT-PWC-CONNECTOR	PWC - Trailer Connector	Price: $109.99	Weight: 1 lbs.
Performaire "Weather Center" Option Indoor / Outdoor Weather proof connector mounts in side of trailer and allows for cable from sensor housing to be easily plugged in. Comes with length of cable for outside connection and water proof cover for when not in use.
Part: ALT-PWC-CLAMP	PWC - Clamps	Price: $29.99	Weight: 1 lbs.
Performaire "Weather Center" Option - Set of 2 Pole Mounting Clamps.
Part: ALT-PWC-PAGER	PWC - Pager	Price: $289.99	Weight: 1 lbs.
Performaire "Weather Center" Option. One pager comes standard with "Weather Center", but keep the extra as a spare, to run two cars, or to loan to a friend. Or, buy a spare with a friend, and split the cost of the system.
Part: ALT-PWC-POWER-ADPT	PWC - Power Adapter	Price: $74.99	Weight: 2 lbs.
Performaire "Weather Center" Option - 110Vac to 12Vdc Converter/Power Supply (5 amp) (Recommended is 110Vac Outlet is available) DO NOT use small wall transformer to power system!
Part: ALT-PWC-ANTENNA-GPA	PWC - Antenna Adapter	Price: $74.99	Weight: 2 lbs.
Performaire "Weather Center" Option - Ground Plane Antenna adapter. (Allows antenna to be mounted to sensor post instead of side of trailer.)
Part: PA2	Performaire Weather Station	Price: $389.99	Weight: 3 lbs.
WEB SPECIAL!! $389.99 The Latest Version Available!! NHRA & IHRA Contingency item! When you purchase a weather station from Biondo Racing, you will be getting the latest in weather station technology, and the latest version of that particular model. With years of on-track experience, we are able to give you an important tip sheet on using the unit and dialing in your ET or throttle stop. We sell the units that work, and we are not the manufacturer, we are racers that use the units! First and foremost, this latest version is packed with the same prediction capabilities as the original PerformAIRE, but also allows for 1 run predictions with preset and user defined ratios, multiple weather variable predictions (oxygen altitude -optional-, density altitude, air density ratio, correction factor, dew point, and vapor pressure), and corrects prediction for wind effects, which are customizable. Other features include: Large LCD Display. Last Air Sample "Hold". You can save a run at a specific time and recall it later. State of the art weather sensors - temp, humidity, barometer, vapor pressure, and dew point : quick responding and extremely accurate. 400 run database - can be split up to hold 10 different cars or tracks, all runs are entered on the Data Entry Keypad, and stored with a date and time stamp. Highly Accurate Prediction Program - predicts your ET or Throttle Stop settings, Jet Sizes, etc. through exact scientific equations formulated specifically for internal combustion engines. Run Completion (to help figure what you would have run on a pass when you lifted early), and bad run detection feature. Download kit available for your PC. (Part #PADL-5) Oxygen Sensor, and Oxygen Altitude also available. (Part #PA2-O2) NHRA & IHRA Contingency money offered! This version has a NEW "Standalone" Windows Download Data Analysis Package! Buyers of this product usually buy a Performaire Carrying Case, and Handheld Wind Meter.
Part: PA2_PA2-CASE	PA2 & PA2 CASE	Price: $409.99	Weight: 5 lbs.
Combo package on Performaire Weather Station (Part #PA-2) and Performaire Carrying Case (Part #PA2-CASE)
Part: PA2-O2	Performaire with O2 Sensor	Price: $699.99	Weight: 3 lbs.
NHRA & IHRA Contingency item! Same as PA2 with optional Oxygen sensor. Buyers of this product usually buy a Performaire Carrying Case, and Handheld Wind Meter.
Part: PA2-CASE	Performaire Carry Case	Price: $24.99	Weight: 1 lbs.
Padded Carrying Case for the PA-2, or the PA2-O2
Part: PADL-SW-SERIAL	Download for PA2, PA2-02, PAE	Price: $74.99	Weight: 1 lbs.
Do you need a USB to serial port adapter for your computer? No USB adapter needed add Altronics USB Adapter #ALT-USB-CONV for $74.99 Performaire Download kit - The Performaire computer's data base can be downloaded into a PC through a serial port on the PC. This goes for Performaire (PA2 or PA2-O2) and Eclipse (PAE or PAE-O2). You can download the data directly into a spreadsheet where the runs will be automatically charted showing a visual relationship between your cars performance and the changing atmosphere. This allows for the easy removal of bad runs from a database and more accurate predictions.
Part: PADL-SW-USB	Download for PWC, PAPC	Price: $74.99	Weight: 1 lbs.
Performaire Download kit - The Performaire computer's data base can be downloaded into a PC through a USB port on the PC. This goes for The Weather Center (PWC) and the Performaire PC Version (PAPC). You can download the data directly into a spreadsheet where the runs will be automatically charted showing a visual relationship between your cars performance and the changing atmosphere. This allows for the easy removal of bad runs from a database and more accurate predictions.
Part: PAE	Performaire "Eclipse"	Price: $569.99	Weight: 4 lbs.
WEB SPECIAL!! $569.99 NEW FEATURE (at your request) : WATER GRAINS NHRA & IHRA Contingency item! The newest model to the PerformAIRE lineup is the PerformAIRE "ECLIPSE". This state of the art handheld model features an internal fan aspirated "sensor tunnel" that allows air to flow directly across the sensors for accurate and ultra quick weather readings, even in direct sunlight! The PerformAIRE "ECLIPSE" also features many new enhancements included the newest in battery technology a (Li-Ion) Lithium Ion rechargeable battery (charger included). This Li-Ion battery allows unit to take several hundred air samples without needing to be recharged. The PerformAIRE "ECLIPSE" is packed with the same prediction capabilities as the original PerformAIRE, but also allows for 1 run predictions with preset and user defined ratios, multiple weather variable predictions (density altitude, oxygen altitude, air density ratio, correction factor, dew point, and vapor pressure), and corrects prediction for wind effects, which are customizable. And, as mentioned above, it is now equipped with a measurement for WATER GRAINS. Air sample readings are made easier with auto stabilization technology that automatically lets user know when the weather reading has stabilized and is accurate. The backlit LCD display allows for easy night viewing and the self-standing rubber boot with removable wrist strap and belt clip protects unit and makes it easy to carry.
Part: PAE-WD	Performaire "Eclipse" w/wind	Price: $619.99	Weight: 4 lbs.
Same as the Performaire "Eclipse" (#PAE) with the addition of a Pop-Up Wind sensor that allows for Wind Speed and Gust measurements. Sensor is ultra fast responding and has no moving parts to wear out!. ET and Throttle stop predictions can now be adjusted automatically for wind effects on the fly!
Part: PAE-O2	Performaire "Eclipse" with O2 Sensor & Wind	Price: $819.99	Weight: 4 lbs.
WEB SPECIAL!! $819.99 NEW FEATURES (at your request) : WATER GRAINS & WIND NHRA & IHRA Contingency item! Same as above #PAE with the addition of an Oxygen Sensor, and a Pop-Up Wind sensor that allows for Wind Speed and Gust measurements. Sensor is ultra fast responding and has no moving parts to wear out!. ET and Throttle stop predictions can now be adjusted automatically for wind effects on the fly!
Part: PAPC	Performaire "PC"	Price: $579.99	Weight: 9 lbs.
NHRA & IHRA Contingency item! The PerformAIRE PC allows your Personal Computer (not included) to gather weather data and predict the performance of your vehicle. Externally mounted sensor housing and wind sensor provides weather data with a single cable connection to the USB port of your PC. Aluminum extruded Sensor housing is fan controlled and provides accurate readings in sunlight. Unit comes with easy to use logbook software allows for complete run storage, weather tracking, maintenance, and predicition capabilities. PerformAIRE PC logbook software controls sensor readings and uses stored run data to predict performance. CLICK HERE for more features and specs. Overall Features of the unit are: Fan Controlled, PC Powered, Temperature, Relative Humidity, WATER GRAINS, Absolute Pressure, Air Density Ratio, Dew Point, Correction Factor, Vapor Pressure, Density Altitude, Wind Speed, Wind Direction, ET Prediction, Throttle Stop Prediction, Throttle Stop Ratio, 1 Run Predictions, Wind Correction, Multiple Variable Prediction, Sea Level ET, Performance Tuning.
Part: PAPC-O2	Performaire "PC" w/O2	Price: $769.99	Weight: 9 lbs.
Same as above with the optional Oxygen Sensor, and Oxygen Altitude.
Part: CC-PRO-7-LT-PGR	Crew Chief Software for PAPC Models	Price: $299.99	Weight: 1 lbs.
For Windows Vista, Windows XP, Windows 2000, Millennium or later, 1024 x768 Screen Display and at least 128 meg of ram. This version of the Crew Chief Software was made specifically for the PAPC and PAPC-O2 (Performaire PC models). It has all the features, and functions, except the ability to "page", since those specific models are not capable of that feature.
Part: CC-PRO-7	Crew Chief Pro 7	Price: $279.99	Weight: 1 lbs.
NHRA & IHRA Contingency item! For Windows Vista, Windows XP, Windows 2000, Millennium, or later version, 1024 x768 Screen Display and at least 128 meg of ram. Some new features in Version 7 will be the addition of cutting-edge technology in the prediction modules, the elimination of 30% of the keystrokes to enter a run, and some innovative and amazing screens. With the 7.0 Version you get all the features of the earlier versions, and as always the Finish Line Manager. Click to see the Finish line Manager Screen Shot. This software is most advanced tool for Sportsman Racers…….What does it do?? With the iCard Receiver Integration optional receiver that we sell you will be able to track ALL your competitors, view all their runs, and even enter your run in Crew Chief by clicking on your run. You can view all the runs, just one class, one day, one driver, or all the cars in a specific category (for example a stocker can view all the K/SA cars). Click for a SCREEN SHOT. READ MORE……CLICK HERE to view a detailed description of the listed features when using Crew Chief in conjunction with the ICARD-USB software. General Info on the Crew Chief Pro: : Are you tired of searching through your paper logbooks for run info? Are you loosing because your car won’t run the number? If so, read on about the “Crew Chief Pro”. It is an electronic logbook (click to see main screen) that takes the place of your Paper Logbook completely, with a very small learning curve. Crew Chief Pro accurately predicts Throttle Stop Timers and your ET’s for both ¼ mile, and 1/8th mile. With the purchase of this software, you get free updates for 1 year, and when you purchase the software you will be sure to get the latest version, with the latest updates. With this software you can store and analyze Reaction Time, 60 Foot Time, 330 Foot Time, Eighth Mile Time and Miles Per Hour, 1000 Foot Time, and Quarter Mile Time and Miles Per Hour, Tuning Changes, Weather Conditions, Track Conditions, Comments, plus any other information you wish. Great for all ET, Super Gas & Comp, Class Racers, Jr. Dragsters, Comp Eliminator, and Federal Mogul Cars. Entering runs is a snap, and you will have the incredible power for E.T. and Throttle Stop predictions. Here are a list of the features, CLICK HERE to view a detailed description of the listed features. It is quite lengthy, but it is very worth it to read through!! Easy to use and fast! Similar Run Analysis Performance Summary Analysis Split Time Interval Report Automatic Weather Stats Different Combinations are Separate Databases Powerful Report & Search Capability Complete Opponent Tracking Module ”Margin of Victory” Analysis. Click to see the screen. Run Completion. (If you have not braked). Click to see the screen. Contingency Money Posted Complete Accounting Program Personalize it by putting your own pictures in Print your track’s tech cards. Click to see the screen. Includes racing engine Sounds

Part: CC-PRO-7-PGR	Crew Chief Pro 7 - Paging	Price: $399.99	Weight: 1 lbs.
For most owners of Weather Station systems, you will have to input info manually to utilize this software. The Altronics "PerformAire Weather Center" can be connected to interface (communicate) with the Crew Chief Software by purchasing the software and cable below. The "PerformAIRE PAPC", or the "Altalab" systems do not require anything else to interface. No Thanks add Altronics PWC USB Cable and Software #ALT-CC-USB for $34.99 NHRA & IHRA Contingency item! For Windows Vista, Windows XP, Windows 2000, Millennium or later, 1024 x768 Screen Display and at least 128 meg of ram. "Crew Chief Pro 6 Pager" (CC-Pro 6 Pager) versions are the same as the CC-PRO-6, but in addition, they are designed to work with Paging Weather Stations from Altronics, Altalab, and soon Computech. (Older version weather stations may need to be updated). CC-Pro-6-PGR will send ET and Throttle Stop Predictions through your pager system. The Pager Enabled Versions send predictions to the pager every 2 minutes. A reading is taken automatically every 5 seconds and predictions are recalculated each time. This includes 4 Different ET Predictions and Throttle Stop Predictions. If you are an ET racer then you get 4 ET formulas including YOUR OWN Formula. Throttle Stop users get only Throttle Stop Timers. PLUS THESE CUSTOMERS GET A FULL FEATURED GRAPHING PROGRAM! This can graph all weather readings while you were in the staging lanes. You can view the graph or print a complete report of the data. You can even graph every prediction the program made during the time you were waiting to race. The graphing program also allows you to graph the ETs on top of the weather, a very neat and useful analysis program. For Windows XP, Windows 2000, or Millennium, 1024 x768 Screen Display and at least 64 meg of ram.
Part: CC-VIDEO	Crew Chief Video	Price: $29.99	Weight: 1 lbs.
Be sure to select your application before ordering: Select One DVD VHS A 2 hour VHS or DVD training video showing how the Crew Chief Software works. This is a real time saver since you are shown how the "experts" use them program.
Part: ALT-CC-USB	PWC / Crew Chief USB Connector	Price: $34.99	Weight: 1 lbs.
The owners of Altronics "PerformAire Weather Center" require this 'driver' software and connector cable to interface (communicate) with the Crew Chief Software. The "PerformAIRE PAPC", or the "Altalab" systems do not require anything else to interface. If the Altronics "PerformAire Weather Center" was purchased before 2002, a different cable may be required.
Part: ICARD-USB	I Card Receiver - USB	Price: $299.99	Weight: 4 lbs.
Include the ICARD High Gain Reception Antenna? No Thanks High Gain Antenna $80.00 iCard®USB works great in conjunction with the Crew Chief Version 6 Software. When joined together they can automatically enter your runs onto the Crew Chief Version 6 software. Perfect for organizing run results for all cars and accurately predicting E.T. and Throttle Stop settings for your own car. As a stand alone item, information is streamed wirelessly and archived on a PC or laptop for later review and analysis. iCard®USB is also a must-have for race officials, team managers, and media professionals. iCard®USB works with any laptop or PC with these minimum requirements: USB 1.0, Pentium II (350 mHz) processor, Windows 98SE, 2000, ME, or XP. iCard®USB displays real-time information and archives all information broadcast at the event: each competitor's information Event schedule Schedule updates Individual driver pages, class pages, and more. Info can be saved and imported into Excel, Lotus, or other spreadsheet applications for later analysis or review iCard®USB includes: iCard®USB receiver and cable Quick Start Guide and instructions Software designed just for your needs detachable antenna It will function at all iCard® supported events
Part: ULTRALOG	Ultralog Log Book	Price: $129.99	Weight: 1 lbs.
With the ULTRALOG Electronic Logbook the PerformAIRE WEATHER CENTER can provide real time weather tracking in you trailer and downloadable prediction analysis. It automatically generates graph that show bad runs and how data effects predictions. ULTRALOG is a full featured Drag Racing Logbook allowing for run storage, run analysis, run prediction, maintenance scheduling, vehicle setup, weather tracking and also directly interfaces (with the interface module below-Part#ULTRALOG-PA) with PerformAIRE weather stations/weather centers and INFORMER data recording systems. The Main review panel allows for reviewing data entered into logbook. Each logbook can hold 50 events. Each event can hold 15 runs. ULTRALOG allows for an all in one record keeping solution for your racing operation.
Part: ULTRALOG-PA	Performaire W/S Interface Module	Price: $74.99	Weight: 1 lbs.
The Interface needed to connect any of the PerformAIRE weather stations or "Weather Center" to the Ultralog Logbook.
Part: WSC-2	Tag Systems "Command-Air"	Price: $429.99	Weight: 3 lbs.
Free PC Link Software with cable and USB Port & Carrying case. (As shown in photo). USB Port also can be used for the uploading of data to the PC and will allow future upgrade to the WSC-2 to be downloaded and installed on the unit when they are available. The Portable Weather & Prediction System that puts you in command! The TAG Systems "Command-Air" replaces the best selling TAG Weather Station Computer (WSC-1), and reaches unmatched heights in prediction capability and system features. Since 1987, racers of all types have counted on TAG Systems to provide them with the electronics and software needed to remain competitive. TAG Systems’ history of offering state of the art products at competitive prices continues with this fantastic new generation in our trusted product line. The Complete System A Single Unit Offers both Weather Monitoring and Prediction Calculations Menu design offers ease in setup and usage of the system Large logbook stores multiple runs, in up to four separate logbooks Logbook names are customizable for user ease in recognition Great for use by individual racers or teams Scrolling feature allows viewing of all runs in each logbook Completely portable and self contained, nothing else is needed, not even a pencil Compact design fits comfortably in the palm of your hand Elastic hand strap provides comfortable, secure hand held usage Powered by 4 "AA" batteries, offering over 100 hours of battery life and a low battery indicator Easy to follow provides step by step instructions Rugged enough to take right down the track with you in your vehicle Custom fit carrying case included Backed with a One-Year Manufacturer’s Warranty Satisfaction Guaranteed CLICK HERE for more features and specs.
Part: RA-P	"Race Air - Pro" W/S with Pouch	Price: $449.99	Weight: 4 lbs.
NHRA Contingency item! RaceAir Pro with Pouch This all new digital weather station incorporates all the great features from Computech's track proven RaceAir, such as automatic air sampling, an internal fan, and precision digital sensors for consistent air readings, plus programs for Drag Racing, Circle Track, Road Racing and Karting. Many of the programs are listed below. CLICK HERE for detailed features and specs. Carrying Pouch included 2 Dial-In programs Throttle-Stop program Run Completer Test & Tune Holley Jetting Fuel Injection Jetting Precision Jetting Mikuni Jetting Keihin Jetting Chassis Set-Up More Programs Coming!
Part: RA	"Race Air" W/S	Price: $349.99	Weight: 2 lbs.
NHRA Contingency item! RACEAIR WEATHER ANALYZER Analyze all the different weather variables in the palm of your hand with Computech’s digital RaceAir weather analyzer. Features include automatic air sampling that monitors temperature, humidity, and barometric pressure along with automatic calculations of Air Correction Factor, Density Altitude, Air Density Ratio, Vapor Pressure, Dry Barometer, and Dew Point.
Part: WM	Handheld Wind Meter	Price: $79.99	Weight: 1 lbs.
This is perfect to compliment a hand held weather station. Although wind is never incorporated in the ET or the Throttle Stop Predictions of any weather station, it is a factor that should never be overlooked. With this unit you can find out if the windspeed is stronger or weaker than a previous day or an earlier run. This Wind Meter has: A unique pocket-knife design that conveniently protects the unit, no more misplaced or dangling cases Windspeed, temperature functions, and windchill are included in this highly accurate, yet value-priced instrument Current, maximum windspeed, Average windspeed over 5, 10, or 13 seconds Current temperature & windchill Reads in tenths Replaceable lithium battery Data lock feature Plastic impeller will not corrode
Part: SM-28	Skymaster	Price: $159.99	Weight: 1 lbs.
The "Skymaster" shares all the same great features as the above wind meter (Part #WM), and in addition it can calculate and measure the following: Dew Point Barometric Pressure Altitude Relative humidity Heat Index The "Skymaster" also includes a severe weather alarm.