HVAC CFM Meter ：portable anemómetro is capable to measure wind speed 59~5905ft/min with ±5% high accuracy, monitor air flow volume 0-999900 ft³/min, detect ambient temperature 14℉~113℉. 3 Measurement Modes：Professional wind velometer boasts both Max, Min and Real-time measuring modes, allowing you to accurately measure wind speed and air flow Touchscreen Button：Equipped with touch-screen button, this Anemometer provides a quick, responsive and easy-to-use inteace. Rotatable Wind Gauge： Featuring a 270° rotatable wind sensor, this windometer simplifies the measurement of windspeed and air flow from multiple angles. Multifunctional：Professional wind detector supports 5 optional wind speed units