Anemometer, Rotary Vane, Velocity 0.4 to 89 MPH, Air Velocity Accuracy +/-3 %, Temp. Range 5 to 122, Temp. Accuracy +/-2 F, Relative Humidity Range 0 to 99%, Dew Point Range 32.2 to 155 F, Display Multiline LCD, Data Hold, Battery Type CR2032, Special Features Wind Chill, Heat Index, Barometer, And Altitude, Includes Battery and Instructions RestrictionsHazardous Material