ADVANCED CUP ANEMOMETERThe wind speed direction sensor adopts 4-cup rotating rack construction. The wind blades of the wind speed meter are horizontal with a compass on the top, so you don't have to no need to turn the anemometer to the right wind direction. ACCURATE WIND SPEED INDICATORYF-876 wind speed meter to measure wind speed range from 1.5 to 93 mph, 2.5 to 150 km/h, 1.3 to 81 Knots, 0.7 to 42 m/s with 12-level Beaufort scales. High accuracy of +/- 4%, resolution up to 0.1 m /s. Precise anemometer that reacts to even light wind force. EASY TO USEOnly two switchable buttons and easy to use. With 2.2 inch LCD screen in max/average/current wind speed value displays, it is clear and easy to see the numbers.Manual/automatic power off after 8 days, low power consumption to extend battery life. TRIPOD MOUNT DESIGNThis digital wind speed anemometer has a tripod socket on the bottom plate for mounting on a tripod. It is convenient for you to d record wind speed and free your hands. Ideal for outdoor activities such as dust collection system, drone flight, HVAC, etc. HOW TO INSTALL THE BATTERYThe battery cover of the handheld portable anemometer has a a waterproof rubber ring. It takes 1/4 turn with coins, then a precision flat screwdriver or tapping on the anemometer to remove the battery cover. If you have any quality problem, please contact us at any time.