The AET-935 is a remote vane thermo-anemometer that measures air velocity and temperature. The 75mm vane has a 1.5m coiled connection cable and plug. An ideal instrument for ventilation surveys, air conditioning, heating and environmental monitoring.0.4 to 30m/sec x 0.1Measures air velocity in m/sec, ft/min, mph, km/hr or knotsMeasures volume in m/min (CMM) or ft/min (CFM)Measures temperature C or F35mm hi-contrast LCD display with backlight and function indicatorsDual display for velocity and temperature16 segment bargraph for velocityData hold, min/max hold for airflow and temperatureAverage function based on the last 10 secondsLow battery indicatorAuto power off after 15 minutes of no activity2 Year warrantySupplied with soft carry case and battery