Note: In order to solve the problem of loose batteries, we have optimized the battery mounting method and fixed it with screws 4 in 1 Portable Anemometer: Professional measurement of wind speed, wind temperature, air volume and wind chill (displays 0°C), MAX/Average/Current wind speed selection; 5 wind speed units m/s, ft/min, knots, km/hr, mph; Auto-off after 14 minutes of inactivity; The large backlit LCD display provides clear readings; in MAX mode, the data memory function is not affected by shutdown. Accurate Digital Anemometer: The anemometer measures wind speed in the range of 0~30m/s (0~65 mph) (accuracy +/-5%), wind temperature -10°C ~45°C/ 14°F ~ 113°F (+/-2°C, +/-3.6°F), resolution 0.1m/s; a high-quality sensitive 6-leaf wind wheel is used to effectively reduce wind resistance and improve measurement accuracy. Multifunctional Handheld Anemometer: Ideal for commercial and household use. Such as drones, HVAC, sailing, shooting, kite flying, and fan wind speed testing, knowing