Smart Mode & Handheld Anemometer: Not only support precise and sensitive touch, but portable wind gauges are also designed to measure wind speed, wind temperature and air flow meter Accurate Wind Speed Detector: Thanks to its 8 blades wind meter, the wind velocity meter can measure wind speed range from 0-65mph with +/-5% accuracy Versatile Air Volume Meter: Featuring current/max/min wind speed reading; On the large LCD backlight screen display air temperature,5 unit of wind speed, and air flow unit selection Type-C Rechargeable Battery: Smart touch mode wind anemometer is portable and humanized, this wind speed gauge has a built-in 400mAh lithium battery that can last 30 hours after a full charge Wide Application: Must has user-friendly wind speed meters in many applications, such as checking air conditions, AC duct, HVAC balance