How to use: Press and hold the Mode button for 2 seconds to activate. Wind speed (m/s) Temperature (℃) Display battery level) Press the Mode button and set button simultaneously to turn off. Measurement mode: MAX (maximum wind speed), AVG (average wind speed), CU (current wind speed); Accessories: Main unit: 1, Strap: 1, Instruction manual: 1, Battery: Lithium battery (CR2032).