BLUBOON(TM) Universal Qi Wireless Charging Receiver Wireless Charger Receiver Film for Micro-usb of All Android Mobile (Narrow-interface Down) Ultrathin design, compact and lightweight without increasing additional weight of the phone. If the narrow side of the Micro USB port is on the front side of the phone, choose the narrow-side up receiver. If the narrow side of the Micro USB port is on the back side of the phone, choose the narrow-side down receiver. The receiver should use with the right charging pads.And if the phone is high capacity,the speed of charging will be a little slow.The Charging current is DC 5V/500mA-1000mA . QI Receiver Wireless Charging film for micro-USB of All Android Mobile (Except OnePlus One). 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. Make sure that your mobile is using charge cable with mirco USB head and it is located at the centre of the mobile. In addition, please check out where the Narrow-interface is carefully.