This anemometer measures Air Velocity ( m/s, km/h, ft/s, knots, and mph), Airflow (/) and Temperature (℃/℉). And provides Windchill, Max, Min, Average wind velocity and Airflow readings. Pressing the "LIGHT" key allows you to see the display clearly. The backlight mode auto turn off if there is no operation within 30s. And the machine can be set to automatically turn off the power after 1/5/10/30 minutes, and "off" not automatically turn off. The 2200mAh 3.7V lithium battery provides reliable and long-lasting power for the wind meter. This wind speed gauge can store up to 8000 pieces of data. Note: Data can only be viewed on the machine and cannot be exported. Track wind conditions for outdoor plans in real time. Make your every drone flight, kite flying, boating and joyful. Color: As shown Material: Metal+Plastic Package Contents: 1*pcs anemometer hvac Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.