The JDC GEOS 11 Handheld Weather Station is designed specifically with the high demands of the military and professionals in mind. The GEOS 11 is the only instrument designed to withstand the abuse anything takes out in the field. MEASURES: Wind Speed (current, average, maximum) / Wind Direction via electronic compass / Ambient Temperature (current, windchill, maximum, minimum, water) / Relative Humidity (current, maximum, minimum, dew point) / Barometric Pressure (absolute, relative, maximum, minimum) / Altitude (maximum, minimum). CALCULATES: Windchill - Dew Point - Relative and Absolute Pressure (QFE/QNH) - Weather Tendencies - Density Altitude - Flight Level - Flight Finesse - Height - Variometer - Earth's Magnetic Field in Tesla Unit. FEATURES: Electronic Compass / Three Data Recording Modes / PC Computer Download (with optional contactless adapter and software) / LED Light / Replaceable Ball Impeller / Exposed Sensors. MORE FEATURES: EL Backlight - Aluminum Case - Included Lithium Battery - Mineral Glass Screen - Time, Date, Chronograph - Weather Resistant. SPECIFICATIONS: Windspeed 0 to 186 mph - Windspeed Accuracy +/- 2% - Windspeed Response Time Instant - Windspeed Measuring Units km/h; m/s; knots; Beaufort (scale of 1-12); mph; fps - Temperature -40°F to 185°F OR -40°C to 85°C - Temperature Accuracy +/- 0.5°C at 25°C - Humidity 0.1 to 100% rH - Humidity Accuracy +/- 2% at 50% rH - Humidity Response Time Dependant on airflow - Barometric Pressure 10 to 1100 hPa OR 0.30 to 32.48 inHg - Pressure Accuracy +/- 0.5% at 25°C - Pressure Response Time Instant - Altitude -1,000m to 21,535m OR -3,280ft to 70,653ft - Altitude Accuracy +/- 0.5% at 25°C - Compass 0 to 359° off of North - Compass Accuracy +/- 3° - Operating Temperature: Normal operating temperature: -10°C to +70°C (14°F to 158°F). Display still possible: -20°C to -10°C (-4°F to 14°F). Slow reading of display: -40°C to -20°C (-40°F to -4°F). Power: Instrument: 1 3V CR2032. LED Light:1 3V CR2032 INCLUDED: 4 lithium batteries 3V CR2032 (1 spare for instrument, 1 spare for LED light). Dimensions: 1.81 x 4.73 x 1.26 in. Weight: 6 oz. Waterproof: 5 minutes at 1 meter. Allow for the humidity sensor to be well dried out before using again. ACCESSORIES: PC Interface and Software - Vechicle/Car Mount. Usually ships in 1-3 Business Days. MSRP: $575.00.

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