This Wind Speed Temperature Gauge Anemometer with LCD digital display is ideal for weather enthusiast or professional to measure air velocity and air temperature accurately. This handy palm sized anemometer with strap for convenient carrying. 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. Temperature of CPU computer fans, air blower. LED back light design for operation under poor illumination. Wind chill indication and Beaufort scale. Current / max / average wind speed reading. Five Units of Air Velocity: m/s, Km/h, ft/min, Knots, mph. Powered by a built-in 3V CR2032 battery. Small size, lightweight and portable!! Air Velocity Specification: Range:0 - 30 m/s, 0 - 90 km/h, 0 - 5860 ft/min, 0 - 65 mph, 0 - 55 Knots. Resolution:0.1 m/s, 0.3 km/h, 19 ft/min, 0.2 mph, 0.2 Knots. Threshold:0.1m/s, 0.3 km/h, 39 ft/min, 0.2 mph, 0.1 Knots. Accuracy:+/- 5%. Air Temperature Specification: Thermometer:NTC Thermometer. Range:Between -10C and 45C (between 14F and 113F) Storage Temperature:Between -40C and +60C, between -40F and 140F. Resolution:0.2C, 0.36F. Accuracy:2C, 3.6F Current Consumption:About 3mA Operating Humidity:Less than or equal to 90% RH.