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See more product details A suitable wind speed is a key factor in playing a surfing game. The speed of the wind directly affects the size of the waves. How to find the right time to go surfing, use 816B soon. Traveling with your family to fly a kite will be an unforgettable happy hour. How to fly a kite efficiently. You need to know the blow of the wind. Which direction of wind is most suitable for the takeoff of a kite, as long as you use the 816B to test it. Wind is a weather factor that must be considered when using UAVs. Because wind can affect the stability of UAV. So you need an observable wind speed standard. When you carry a UAV, a large anemometer will be difficult to carry, while 816B can be put in your pocket. The compact 816B has a clear big screen, a battery cover that is not easy to peel off but can be opened with a fingernail, and a humanized hanging rope hole design. Upgraded battery cover design. It eliminates the problems of easy dropping and hard opening. Now it can be operated with only nails or coins. Battery back cover with good touch and anti-skid , makes you feel at ease and save your troubles.







