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When drone and helicopter fly, wrap around the arm when measuring the time of the repo battery
On 2017-04-14 09:36:51
The volume is so big that it can not be defeated by the helicopter's motor sound, it is handy without hesitation and it is handy, it is just fine to attach it to the arm, I do not have to overdo overdischarge and I am enjoying the flight (* ^ - ^ *)
I used a timer for waterproofing Doritech, but recently I thought that I want a small button even if the button is malfunctioning and not waterproofing recently. It is useless. First of all, the liquid crystal can not be seen from other than a certain angle. Even though I thought about using paste it with a magnet, it can not be seen at all depending on the pasting place. And there was no auto off which was in the waterproof way, I can not turn off the power with the liquid crystal kept on. I'm afraid the battery will be gone quickly .... This is not recommended. It is cheap, it is awful. The design is simple and the sound is small and small (waterproof is bigger than the sound anyway) There is evaluation, but it is not practical.