The magnetic bracket has 17 super strong N52-grade magnets built in, and the 14N vertical attraction is enough to support the Pocket3 camera plus the battery handle or mobile phone. Even the strongest magnets still have the risk of falling off. It is not recommended to use the magnetic bracket in an environment that requires high-intensity exercise or severe vibration. 

No, there is a protective pad inside the aluminum alloy where it contacts the camera body, and the expansion frame does not come into direct contact with the camera. 

The expansion frame has cold shoe, 1/4, and Action interfaces. It can be adapted to accessories with cold shoe interfaces such as fill lights, microphones, etc., accessories with 1/4 interfaces such as tripods, selfie sticks, etc., and accessories with DJI Action quick release interfaces such as adapter accessories, neck brackets, shoulder strap brackets, etc. The expansion frame needs to be installed directly on the Pocket3 camera, so the silicone protective cover cannot be used at the same time. If the body film is applied, the lock may not be closed. Support the use of the original protective case at the same time. 

The magnetic bracket has three joints that can adjust the angle. The adjustable angles are 360°, 270°, and 180°. The joints have rotation damping to avoid angle deviation during use. 

No, the TF card slot, joystick, and buttons are all opened to avoid them. They can be used normally when the expansion frame is installed. The bottom quick release interface can also be connected to the threaded handle or endurance handle normally