AT Digital Handheld Wind Speed Gauge Measure Meter Anemometer Thermometer with LCD 65MPH Simultaneous measure and display wind speed & temperature Fast Air Speed measure range: 0 ~ 30 m/s (or 0 ~ 90 km/h if converted to kilometers per hour) Display options in wind speed mode are current wind speed, maximum wind speed since power-on, and average wind speed since power-on Wind chill is displayed in the selected temperature unit Switchable between C or F