Magnetic design, stronger magnetism, your wallet locks in place with good force and your phone won't accidentally fall off with a bump while on the car mount
The thickness is only 0.5mm, the outer diameter is about 2.1 inch/55mm and the inner diameter is 1.7 inch/45mm, which will not affect the use and appearance of the phone
Note: Before installing the metal ring, please ensure that the surface is clean and dry, and choose the proper wireless charging location.