AFUNTA GM816 LCD Digital Wind Speed Temperature Measure Gauge Anemometer - Ideal Tool for Windsurfing, Sailing, Fishing, Kite Flying and Mountaineering Air velocity and temperature measurement Ideal tool for windsurfing, sailing, fishing, kite flying and mountaineering Also use it for industrial and home purpose such as measuring wind speed andtemperature of CPU computer fans, air blower LED back light design for operation under poor illumination Wind chill indication and Beaufort scale