Description: This anemometer with palms size is protective by rubber shell. It can measure wind speed and temperature accurately. It is an great tool for windsurfing, sailing, kite flying, measuring speed And temperature of the CPU computer fans, air conditioners, etc. Features: Max wind speed/average wind speed/current wind speed selection degree centigrade/degree fahrenheit temperature unit selection 5 Units selection: m/s, Km/h, ft/min, Knots, mph Wind force level LCD backlight display Manual/Automatic power off Low power tips Measuring Mode: can measure wind speed and temperature with max / average / air flow Design: portable size, large LCD screen with backlight, chill indication and battery level Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Airspeed Range: 0-30 m / s, 0-5860Ft / min, 0-55 Knots, 0-90 km / h, 0-65Mph Resolution: 0.1 m / s, 19 Ft / min, 0.2 knots, 0.3 km / h, 0.2 MPh Threshold: 0.1 m / s, 39 ft / min, 0.1 knots, 0.3 km / h, 0.2 MPh Accuracy: ± 5%. Air Temperature range: -10 ~ + 45 degree centigrade, 14 ~ 113 degree fahrenheit Resolution: 0.2 , 0.36 degree fahrenheit Accuracy: ±, ± 6 degree fahrenheit Thermometer: NTC Thermometer Operating temperature: -10 ~ + 45 degree centigrade (14  ~ 113 degree fahrenheit) Humidity: Less than or equal to 90% RH Storage Temperature: -40 ~ + 60 degree centigrade, -40 ~ 140 degree fahrenheit Power consumption: About 3 mA Wind speed Unit: m / s, Km / h, M / min, Knots, Mph Power: 3 V CR2032 battery (not included) Dimensions: 107x43x21mm Include: 1x Anemometer 1x Neck Strap /Lanyard 1x Manual