Item Type: Digital Anemometer_x000D_ Material: ABS_x000D_ Model: 8907_x000D_ Battery: 1.5V 4xAAA (not included)_x000D_ Uses: Flying kites, aviation planes, drones, sailing, fishing, hiking, shooting, etc._x000D_ Basic parameters:_x000D_ 1. Wind speed measurement range:_x000D_ UnitWind Speed RangeResolutionLowest Starting PointAccuracy_x000D_ m/s0.0~45.00.010.33%0.1_x000D_ Ft/min0.0~88000.01/0.1/1603%20_x000D_ Knots0.0~88.00.010.63%0.2_x000D_ Km/h0.0~140.00.0113%0.4_x000D_ Mph0.0~1000.010.73%0.2_x000D_ _x000D_ 2. Air volume measurement range:_x000D_ CFM0-999900ft^3/min_x000D_ CMM0-999900m^3/min_x000D_ UnitRANGERESOLUTIONAREA_x000D_ CFM(FT^3/MIN)0-9999000.001-1000.001-9999ft^2_x000D_ CMM(M^3/MIN)0-9999000.001-1000.001-9999m^2_x000D_ _x000D_ 3. Unit conversion:_x000D_ m/sFt/minKnotsKm/hMph_x000D_ 1m/s1196.871.9443.60 2.24_x000D_ 1ft/min0.0050810.009870.018290.01138_x000D_ 1knots0.5144101.2711.85191.1523_x000D_ 1km/h0.277854.690.5410.6222_x000D_ 1mph0.446487.890.86791.60711_x000D_ _x000D_ 4. Wind temperature:_x000D_ (1) Temperature measurement range_x000D_ _x000D_ UnitGearResolutionAccuracy_x000D_ 0~450.11.0_x000D_ 32~1130.181.8_x000D_ _x000D_ (2) Humidity measurement range_x000D_ _x000D_ UnitMinimum/MaximumResolutionAccuracyTest conditions_x000D_ %RH10~900.15%90%RH non-condensing_x000D_ _x000D_ 5. Working current:_x000D_ _x000D_ UnitDESCRIPTIONMinimum/MaximumTYPTest conditions_x000D_ mAWorking current 115~2018Backlight is off_x000D_ mAWorking current 220~2523Backlight is on_x000D_ VLow battery indicator3.5~4.54_x000D_ uAshutdown current0~85_x000D_ _x000D_ 6. Working environment:_x000D_ _x000D_ Temperature0~50 (32~122)_x000D_ Humidity40~80%RH_x000D_ _x000D_ 7. Storage environment:_x000D_ _x000D_ Temperature -40~60 (-40~140)_x000D_ Humidity80%RH