Description Features:1. Air Velocity Temperature Measurement; 2. Max/Average/Current air velocity measurement; 3. C/F Temperature unit selection; 4. Five units of air velocity: M/s, Km/h, Ft/min, Knots, mph 5. Beaufort scale; 6. Backlight display; 7. Manual/ Auto power shut off; 8. Wind chill indication; 9. Low battery indication. Specifications:Measure in MPH, Km/h, Knots, Ft/min or M/sWind speed range from 1MPH to 65MPHTake live speed readings, Max speed readings or Average speed readings, your choice Also provides temperature readingsAlso includes Beaufort scale on displayWind Speed Accuracy of +/- 5%When temperature reaches below 32F it will display the current wind-chillChange temp readings from C to F with a pin under the back coverBack-lit display remains on for 12 seconds until button pressAuto-off after 14 minutesOperates on one 9V battery(NOT INCLUDED )Size: 160 x 52 x 35mmPackage included:1 x Anemometer