Samsung S6 Edge Wireless charge How? What's the principle?

The Galaxy S6 Edge is built with a wireless charging coil that allows you to charge the device with a wireless charging board. The charging coil in the wireless charging board generates an electromagnetic field, which transmits the energy to the device's inductive coil through an inductive coupling, which is then converted to a power stored in the device battery.

Wireless charging board is sold separately, if necessary, can be purchased through Samsung Online mall or Samsung stores.

All right, this wireless charging people do not go to Taobao to buy, this may not be safe, so to the official owner or store to buy better.