This compact and portable ANENG GN301 digital anemometer, based on high-speed and high-precision MCU calculation, Features high accuracy and fast response of measurement. It can be used to measure wind speed and air temperature in kinds of outdoor and indoor occasions. Features: - Compact & Ultra-lightweight: Mini size and light weight for easy carrying. - LCD Display with Backlight: Humanized design for easy clear reading even in the dark. - 2 Functions Included: Wind speed and air temperature. - Switchable Units: Wind speed: m/s, km/h, ft/min, knots, MPH; temperature: C, F. - Additional Features: Available maximum and minimum value of measurement; automatic & manual power-off function; data hold function. - Wide Application: It is suitable for measuring 2 parameters mentioned above when flying an airplane, helicopter, drone, model aircraft, hiking, mountaineering, voyaging, golfing, hunting, shooting, fishing or other outdoor activities. Specifications: Model: GN301 Material: ABS Color: Black&Green Power Supply: 3 * 1.5V AAA battery (NOT included) Wind Speed Range: 0.4~30.0m/s; 1.4~108km/h; 0.9~67.0MPH; 0.8~58.0knots; 80~5900ft/min Wind Speed Unit: m/s, km/h, MPH, knots, ft/min Resolution: 0.1m/s; 0.1km/h; 0.1MPH; 0.1knots; 1.0ft/min Accuracy: (3%+0.3m/s); (3%+1.0km/h); (3%+0.4MPH); (3%+0.4knots); (3%+40ft/min) Temperature Range: -20~70C; -4~158F Resolution: 0.1C; 0.1F Accuracy: 1.5C; 2.7F Item Size: Approx. 179.4*56*29.7mm / 7.06*2.2*1.17in Item Weight: Approx. 100g / 3.53oz Package Size: Approx. 270*100*45mm / 10.63*3.94*1.77in Package Weight: Approx. 155g / 5.47oz Note: Please read the Users Manual before use. Packing List: 1 * Digital Anemometer 1 * Users Manual(English)