Input: 5V Charging current: 1000mA Function: Charged by power supply with wireless emitter Compatible with all Android devices with Micro USB Usage: Built-in wireless receiving coil, which must use together with wireless charging emitter Transmition distance: 5mm Charging efficiency: >70% Charging voltage: 5V Executive standard: Qi Phone port which has narrow top and wide bottom uses forward Note: Phones with Qi standard transmitter can directly use.