... multi-function display4-digit whole show ,wind speed units of m/s ,ft/min, at sea speed, and miles/hourThrough the built ... LSI microprocessor designDisplay Dual function 8888 count LCD displayMeasurement units m/s ,km/h, ft/min, knots, mph, Temperature: ºC or ºFData ... Record and Recall MAX and MIN readingsAuto Power off After 15 minutes with disable featureOperating Temperature 32 º F to 122 º F ...