At the highest of the controller, which works by using radio, the antenna slides up out and is particularly sprung to provide a clip for the cellular phone, which serves for a check. It is actually made with four rotors, it may be managed via its cell app out https://starshipdronewith4kcamera26541.pointblog.net/the-smart-trick-of-motor-brushless-that-nobody-is-discussing-73554672