This easy-to-use mini vane thermo-anemometer has user selectable measuring units for air velocity and temperature. The lightweight, slim line unit also displays minimum and maximum measured values since power on. 3 POINT CALIBRATION CERTIFICATE INCLUDED 0.4 to 30m/sec x 0.1m/sec Selectable measurement units: m/sec ft/min, mph, km/hr or knots Temperature -20° to 70°C or °F 30mm LCD display with function indicators Sampling rate of 1 reading per second LCD Backlight for applications in low light environments Min Max Memory since power on Auto Power Off after 15 minutes of no activity Low Battery indication Supplied with AAA batteries 2 year warrantyTechnical Specifications:Range m/sec ft/min km/hr mph knotsMinimum 0.4 80 1.4 0.9 0.8Maximum 30 5,900 108 67 58Resolution 0.1 1 0.1 0.1 0.1Accuracy ±3% of reading ±0.3m/secPower 3 x AAA BatteriesDimensions 178.5 x 56 x 30.5mmWeight 115g incl. Batteries