MULTIFUNCTION WIND METER: designed to measure wind speed (0-30 m/s, 0-5860 ft/min, 0-55 knots, 0-90 km/hr, 0-65 mph) with 12 level beaufort scales, and detect air temperature ( 14F and 113F), easy to switch / units by press the button with no tools, support wind chill indication, display Max/ Average/ Current air velocity on LCD screen in real time, more convenient than 2 buttons anemometer EASY TO INSTALL BATTERY USE: Remove off the yellow rubber protector cover, then open the battery door, its more easier than other wind meter gauge. Put a CR2032 battery (included), turn on windspeed anemometer by press Mode for 2s to measure wind and analyze environment to do activities BACKLIGHT AUTO/MANUAL SHUTDOWN: Press any keys to active the wind anemometers backlight last for 12 seconds, convenient to read at dark place, press Mode + SET simultaneously to turn off the wind meter, or no operation for 14 minutes it will auto shutoff MULTIPURPOSE WIND DETECTOR: This digital wind speed anemometer is perfect for industrial and home purposes, like measuring speed of HVAC velometer,air conditioner and temperature of CPU. The mini anemometer for sailing, shooting, hang-gliding, drone wind speed test, or power and manufacture industrial. HANDHELD ANEMOMETER: Wind speed thermometer is compact and light design, small enough to put into pockets, easy to carry and operation. Hand size wind speed tester with simple but detailed manual. Please dont hesitate to contact us if you meet any question