1）This metal ring is not magnetic, Compatible with Magsafe charger, Make your standard case compatible with MagSafe for fast and easy magnetic wireless charging;

2）Please place the metal ring on the outside of the case, and ensure that the case is smooth and flat on the outside.

3）Compatible with iPhone 13 series, 12 series, the Samsung Galaxy S21 and more; Provides easy place-and-go wireless charging by automatically aligning your phone with your MagSafe wireless charger and locking it in place

4）Outer diameter:2.17inch/55MM, Inside diameter:1.77inch/45MM.Metal ring is 0.6 MM thick, weight 3.2g , have no effect on the use and appearance of your phone.Made up of metal and sticker.