Is not required to plug in USB line, also do not need to connect the power cord socket, you can achieve portable wireless charging mobile power. It has a big difference with the wireless charger. Principle of wireless charging mobile power: on the basis of the traditional mobile power, increase the wireless charging function. In function is equivalent to a mobile power and a wireless charger fusion. Because the wireless charging requires a sender and receiver, the mobile power supply is based on the conventional mobile power supply, while the charging of the mobile phone must support the wireless charging, and the receiving coil with wireless charging. In the sending and receiving end each have a coil, the transmitter coil connecting cable power generating an electromagnetic signal receiving coil induction transmitter electromagnetic signal and generate a current to charge the battery.