Ray-JrMALL Orange Measure Handheld LCD Digital Anemometer Air Wind Speed Meter Tester Measurement items: Air velocity,Air temperature . Measurement range:Air velocity,0.3~30m/s,0~90km/h,0~5860ft/min,0~55knots,0~65mph(5%).Air temperature,-10~45(2) . Auto power shut off: 14 minutes without any operation.