Adopt wireless sensor charging design. A sensor charger which is specially designed for Wii controller. Powered by USB, also can use DC 5V output power adaptor to charge. Use a combination of advanced compensation winding technology, small-wave distortion. Adopt single –chip control switch combination timely compensation regulation, achieve a rapid non-contact conditioning instantaneous overload capacity strong. Come with 2pcs of 4800mAh rechargeable batteries for the Wii remote controls - no need to take out the battery when charging. No need to add extra power supply - get the power from the USB port of the Wii console.