Smart Meter AZ-8912 Windspeed Meter Anemograph Anemometer Meter +RH% TEMP/ DEW POINT Handheld Anemometer Remote Fan Air Flow Meter AZ8912 Digital Anemometer Remote Fan Air Flow Meter Remote fan with built-in temp.&humidity sensor Measures air velocity ,temperature, humidity, air volume,dew point& wet bulb temperature Patent design rotation sensor cap to protect sensors Windspeed metric and imperial units selectable