Main Functions: This Digital Anemometer is for Measuring Wind Speed and Temperature. Additional Functions: Wind Chill Indication, Data Hold, Auto/Manual Power Off, High Accuracy, Pressure Sensor . Large LCD Display With Backlight: Clear Display, Easy To Read Even In The Dark. 2 Types of Unit of Measurement to Choose: C/F. External Thermistor and 6-Blade Wind Turbine: Fast, Accurate and Reliable Response. Ideal for Outdoor Activities Outdoors: Sailing, Windsurfing, Surfing, Fishing, Kite Flying, Shooting, Mountaineering, Steel and Electricity Industry, etc. Product Description The The Proster's digital anemometer is ideal for outdoor activities such as windsurfing; Flying Kite, model aircraft and UAV; Sail; Surfing, fishing; Hiking; Filming; Walking 1.Range: 0 - 30m/s, 0 - 90km/h, 0 - 5860ft/min, 0 - 65mph, 0 - 55Knots 2.Resolution: 0 .1 m/s, 0.3 km/h, 19 ft/min, 0.2 mph, 0.2 knots 3.Threshold: 0.1 m/s, 0.3 km/ hrs, 39 ft/min, 0.2 mph, 0.1 knots Accuracy: 5% Range: -10 - 45 centigrade, 14 - 113F Resolution: 0, 2 centigrade, 0.36F Accuracy: 2 centigrade, 3.6F Note: Please remove the rubber then rotate the battery, then insert the battery into the cell of battery Large, easy-to-read LCD display with backlight. Wind speed in Beaufort wind scale bar graph. Wind chill indication Data hold function High precision pressure sensor Quick response, external thermistor Auto/manual power off Rubber protective cover, non-slip, anti-fall, durable. Temperature display in C/F Wind speed range: 0-30 m/s Wind temperature range: -10 - 45 centigrade (14-113F) Current/max/average wind speed reading Wind speed unit: m / s, km / h, ft / min, knots, mph CE approved 1 x Digital Anemometer