Universal DIY QI Wireless Charging Receiver Pad Coil w/ USB Head for all Micro-USB Mobile (narrow-interface Up) Universal QI Wireless Charging Receiver film for micro-USB of All Android Mobile. Make sure that your mobiel is using charge cable with mirco USB head and it is located at the centre of the mobile. Ultra thin design, compact and lightweight without increasing additional weight of the phone. Placed in to the charging area after charging, mobile charging machines (in order to machine identification). Easy assembly and disassembly, convenient to use in 3 steps as follows:Plug in the mocro USB of the phone, then place the coil above the battery and close the back cover.