This item is compatible with charging Wii controllers. It features 4 charging ports, allowing you to charge up to 4 controllers simultaneously. Includes 4 matching rechargeable cell packs, eliminating concerns about power availability. Features: - Charges 4 controllers at the same time - Equipped with an impulse voltage circuit design for efficient charging - Uses high-capacity Ni-MH rechargeable cells - Simple and convenient to use - Keeps your setup organized and tidy Specifications: - Color: White - Package Weight: 306g / 10.79 ounces - Package Size: 200 x 100 x 55mm / 7.87 x 3.94 x 2.17 inches User Manual: 1. Plug a DC 5V power source into the input port. The indicator light turns blue. (To disable the indicator light, switch to "Off." To enable, switch to "On.") 2. Insert 1–4 of the included rechargeable cells into the controller slots. The light turns red during charging and changes to blue when fully charged. Package List: 1 x Charging Stand 4 x 2800mAh Rechargeable Cells 1 x USB Cable Note: Wii Remote controller not included