Tips: There is a blue protective film on the surface of the silver ring, Please peel the blue protective film off the silver ring before use.The Metal ring is made of Metal!! NOT MAGNET & NOT MAGNETIC. The metal ring only fit for the smartphone which could support wireless charging function.The ring serves as the medium between your phone and wireless charging, enabling quick alignment and locking of wireless charging in place for convenient wireless charging. Premium Material: The metal ring is attached with a protective sticker, stable, not easy to rust, no fading and no deformation and not slip off easily. Made of ultra thin and lightweight premium stainless iron pieces with strong adhesive tapes, which is more sticky and solid. Guides: Before installing the metal ring on the wireless charger, please ensure that the surface is clean and dry, and choose the proper wireless charging location. Please align your cellphone with your wireless charger, and lock it in place