Compact & Ultra-light: pocket-sized product comes with a storage pouch and lanyard for convenient carrying. LCD Display with Backlight: Humanized design for easy clear reading. 8 Functions Included: Wind speed, wind chill, air temperature, humidity, heat index, dew point, barometric pressure and altitude. Switchable Units: Temperature: C, F; wind speed: m/s, ft/min, knots, km/h, . Additional Features: Available maximum, minimum and average value of measurement; automatic & manual power-off function; data hold function; calibration function. Wide Application: It is suitable for measuring 8 parameters mentioned above when flying an airplane, helicopter, drone, model aircraft, hiking, mountaineering, voyaging, golfing, hunting, , fishing or other outdoor activities. Model: TL- Power Supply: 1 * rechargeable 300mAh lithium polymer Wind Speed Range: 0~30m/s; 0~5860ft/min; 0~55knots; 0~90km/h; 0~65mph Resolution: 0.1m/s; 19ft/min; 0.2knots; 0.3km/h; 0.2mph Accuracy: 5% Wind Chill Range: -40~10C (0~30m/s); -49~50F (0~65mph) Resolution: 0.1C; 0.1F Accuracy: 1C; 1.8F TemperatureRange: -29~70C; -20~158F Resolution: 0.1C; 0.1F Accuracy: 1C; 1.8F Relative Humidity Range: 0~100%RH Resolution: 0.1%RH Accuracy: 3%RH Heat Index Range: 21.1~54.4C (0~100%RH); 70~130F (0~100%RH) Resolution: 0.1C; 0.1F Accuracy: 2C; 3.6F Dew Point Range: -29~70C; -20~158F Resolution: 0.1C; 0.1F Accuracy: 2C; 3.6F Barometric Pressure Range: 10~1100hpa; 10~1100mbar; 0.29~32.48inHg Resolution: 0.1hpa; 0.1mbar; 0.01inHg Accuracy: 1.5hpa; 1.5mbar; 0.05inHg Altitude Range: -700~9000m; -6000~30000ft Resolution: 1m; 1ft Accuracy: 12m; 50ft Item Size: . 11.5 x 4 x 2cm / 4.53 x 1.57 x 0.79in Item Weight: . 47g / 1.66oz color:Black Material:ABS Package Contents: 1 x Digital Anemometer 1 x USB Charging Cable 1 x Storage Pouch 1 x Lanyard 1 x Users Manual(English) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.