Package inculded: 1xCharger Dock+4xRechargeable Batteries+1xCable(Remote controller NOT included.)Super Capacity - Come with 4 high-capacity 2800mAh Ni-MH rechargeable battery packs,up to 500 recharging times if using properly. No need to change the regular AA battery. Save money and protect the environment by using the rechargeable battery.4 Charging Port - Accommodating four Wii/Wii U remote controllers at a time. Once properly inserted, and turn on the switch, the unit begins to recharge, its full-charge, cut-off function protects batteries from being overcharged.Designed for Wii and Wii U Nintendo remote controller / Length of USB cord : 40.6 IN / Station Input voltage:DC 5V / Battery capacity : 2800mAhAuto & Smart Indicator: Red means charging;Blue means fully charged.