Specifications:1,Input Voltage: DC4.3V~5.5V/1.5~2A,it will stopped charging if the voltage is exceed this range2,Output Voltage: 5V±0.1V3,Charging current: 500mAH-1000mAH4,Charging Power: 5W5,Transfer efficiency: above 73%6,Transmission distance: 10mm7,Standard: QI8,Certificate: CE/FCC, compatible with the standard of QI..