HoldPeak HP-846A Digital Wind Speed Air Volume Meter Anemometer Handheld with Data Logger and Carry Case Measurement of Wind Velocity, Temperature. Unit Conversion of them Measurement of Maximum, Minimum and Average Wind Velocity Data Holding, Storing and Deleting Function; Low Battery Indicating Function; Pressing key Audio Ale Auto Power off Function (Button Without Any Operation and The Fan Static After 5 Minutes Will be Tur Memory of 100 Records; Large LCD Display, Backlight Function; Wind Handle Can Elongate