Introduction: Wireless charging uses an electromagnetic field to transfer energy between two objects. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device. This is a new wireless charging module, which oculd provides 5V@300mA (MAX 600mA) power output. It is using the new technology "resonant magnetic coupling, which will reduce the electricity consumption during power transmission. The transfer efficiency could arrive 90%. It could meet your most project requests. Features: Stable Power Supply Insulation Coil Compact Design Specification: Chip on Board: XKT-412 Operating Voltage (Input): 5V Operating Voltage (Output): 5V@300mA (Max: 600mA) Transmitting Terminal Size: 33mm(1.30")(Outer diameter)*5mm(0.20")(Inside diameter)*1mm(0.04")(Thickness) Receiving Terminal Size: 21mm(0.83")(Outer diameter)*10mm(0.39")(Inside diameter)*0.5mm(0.02")(Thickness) Operating Distance: 2-10mm (0.08-0.39") Items Included: Transmitting Eodule x1 Receiving Eodule x1