Features This is a type of digital anemometer used to measure wind speed and temperature. Great tool for windsurfing, sailing, fishing, kite and mountaineering. Current/average wind rate reading. LED backlight design for operation under poor lighting. This handy size anemometer with strap is convenient to carry. Features: Thermometer: NTC Temperature measurement range: -10℃~45℃(14℉~113℉) Resolution: 0.2℃, 0.36℉ Accuracy: ±2℃, ±3.6℉ Aerial Range: 0 - 30 m/s, 0 - 90 k-m/h, 0 - 5860 ft/min, 0 - 65 mph, 0 - 55 knots Resolution: 0.1m/s, 0.3k-m/h, 19ft/min, 0.2mph, 0.2node Threshold: 0.1m/s, 0.3k-m/h, 39ft/min, 0.2mph, 0.1knot. Accuracy: +/-5% Operating humidity: less than or equal to 90% RH Storage temperature: -40°C ~ +60°C (-40℉ ~ 140℉) Battery type: 3V CR2032 * 1 pcs Length: 11.6 cm/4.65 inches. Weight: 110g (approx.) Package includes: 1 x Anemometer 1 x Battery Package List