Features: _x000D_This is a type of digital anemometer used to measure wind speed and wind temperature. _x000D_This handy sized anemometer with strap are convenient to carry. _x000D_LED back light design for operation under poor illumination. _x000D_Current / max / average wind speed reading. _x000D_Great tool for windsurfing, sailing, fishing, kite flying and mountaineering. _x000D_Also use it for industrial and home purpose such as measuring wind speed, temperature of CPU computer fans, air blower. _x000D__x000D__x000D_Specifications: _x000D_Thermometer: NTC_x000D_Temperature Measuring Range: -10 ~ 45 (14~113)_x000D_Resolution: 0.2, 0.36_x000D_Accuracy: 2, 3.6_x000D__x000D_Air Velocity_x000D_Range: 0 - 30 m/s, 0 - 90 km/h, 0 - 5860 ft/min, 0 - 65 mph, 0 - 55 Knots_x000D_Resolution: 0.1 m/s, 0.3 km/h, 19 ft/min, 0.2 mph, 0.2 Knots_x000D_Threshold: 0.1m/s, 0.3 km/h, 39 ft/min, 0.2 mph, 0.1 Knots._x000D_Accuracy: +/- 5%_x000D__x000D_Operating Humidity: Less than or equal to 90% RH_x000D_Storage Temperature: -40 ~ +60 ( -40 ~ 140)_x000D_Battery Type: 3V CR2032*1PCS _x000D_Length: 11.8cm/4.65in_x000D_Weight: 110g(approx.) _x000D__x000D__x000D_Package Includes: _x000D_1 x Anemometer _x000D_1 x Battery 1This is a type of digital anemometer used to measure wind speed and wind temperature. 2This handy sized anemometer with strap are convenient to carry. 3LED back light design for operation under poor illumination. 4Current / max / average wind speed reading. 5Great tool for windsurfing, sailing, fishing, kite flying and mountaineering.