Dual Charging Dock is special designed for charging XBOX ONE wireless controller. This product is equipped with 2 pieces battery pack, which can be installed in the controller. Comes with a USB charging cable,which you can connect the MicroUSB on the battery pack to DC 5V output port or Adaptor port. You can charge the controller directly when the battery packs are installed in the controller. As it is fashionable, useful, convenient, it is a must for players.