Samsung Galaxy S3 S i9300 QI Standard Wireless Charger Charging Receiver Tag -White the receiving coil attached to the phone battery, two the contacts aligned cell phone reserved the two contacts coil installed, cover the back cover of the phone is placed in the charger area can give the phone Oki Method of charging rechargeable machine rechargeable machines with QI flag placed in the charging area placed in to the charging area after charging, mobile charging machines (in order to machine identification)