Proster LCD Digital Wind Speed Gauge Wind Speed Scale Meter Anemometer Thermometer Handheld Anemometer Measure for Sailing Fishing Proster Handheld LCD Digital Anemometer Wind Speed Meter with Backlight : Use to Measure Wind Speed and Temperature; Ideal for Windsurfing; Flying Kite, Aeromodelling and UAV; Sailing; Surfing; Fishing; Hiking and Other Outdoor Activities Wind Chill Indication; Data Hold Function; Auto/ Manual Power Off; High Precision Pressure Sensor; Quick Response, External Thermistor Wind speed range: 0-30m/s;Operating Humidity: less than or equal to 90%RH;Storage Temperature: -40~60, -40~140F; Wind speed unit: m/s, Km/h, ft/min, Knots, mph Air Temperature Range: -10 - 45, 14 - 113F; Resolution: 0.2, 0.36F; Accuracy: 2, 3.6F Air Velocity Range: 0 - 30m/s, 0 - 90km/h, 0 - 5860ft/min, 0 - 65mph, 0 - 55Knots; Resolution: 0.1m/s, 0.3km/h, 19ft/min, 0.2mph, 0.2Knots; Threshold: 0.1m/s, 0.3km/h, 39ft/min, 0.2mph, 0.1Knots; Accuracy: +/- 5%