Do you want to measure air velocity (wind speed) and temperature? You may try this mini anemometer whether you're flying RC planes, drones, wings, helicopters. It's very useful and widely used in hiking, sailing, drone pilot, ventilation system, sea sport competition, wind power, marine industry, exhaust fans, air-conditioning, etc. Features: 2 in 1 digital anemometer for measuring air velocity(wind speed) and temperature. With maximum, average and current air velocity measurement with beaufort scale. 6 wind speed units selection: m/s, ft/min, Knots, Km/h, mph, bft and temperature units / selection. Large LCD display with backlight for easy operation in darkness. Perfect for home and outdoor uses. Low battery indication, wind chill indication, auto/manual power off & energy saving. Specifications: Color: Black + Red Material: ABS Plastic Switchable Wind Speed Unit: m/s, Knots, Km/h, mph, ft/min, bft Range: 030m/s, 090Km/h, 055Knots, 065mph, 05860ft/min Resolution: 0.1m/s, 0.3Km/h, 0.2Knots, 0.2mph, 19ft/min Minimum Wind Speed: 0.7m/s, 2.5Km/h, 1.4Knots, 1.6mph, 137ft/min Air Velocity Accuracy: 5% Temperature Range: -10 45 / 14 113 Temperature Resolution: 0.2 / 0.36 Temperature Accuracy: 2 / 3.6 Auto Power Off: 14 minutes without any operation Thermometer: NTC Thermometer Operating Conditions: -1045 / 14113, 90%RH Storage Conditions: -4060 / -40140 Display: LCD Display with Backlight Battery: 1 * 3.0V CR2032 Button Cell (Not Included) Current Consumption: Approx.3mA Item Size: 47 * 21 * 126mm / 1.9 * 0.8 * 5.0in Item Weight: 86g / 3.0oz Package Size: 13 * 5.9 * 3.5cm / 5.1 * 2.3 * 1.4in Package Weight: 102g / 3.6oz Package List: 1 * Digital Anemometer 1 * User Manual (English)