This item is compatible with charging for Wii controller. It has 4pcs charge port so it can charge 4pcs controllers at the same time. And it have 4pcs match cell packs. so no need to worry electricity problem. Features: Can charge 4pcs controllers at the same time. Its charging with design of impulse voltage circuit. It matched large-capacity Ni-MH cell. Simple and convenient to use. Tidiness when you put. Specifications: Color: White Package Weight: 306g / 10.79ounces Package Size: 200 * 100 * 55mm / 7.87 * 3.94 * 2.17in User Manual: 1. Please plug DC5V into input port, light is blue (If you no need decorate light, please turn switch to off. If you need. turn to ON) 2. Please put 1-4PCS matched cells in controller for charging, the light will turn red when its in charging, after full charging it will turn blue. Package List: 1 * Cell Charging Stand 4 * 2800mAh Rechargeable Cells 1 * USB CableWii Remote controller not included