This item is compatible with charging for Wii controller. It has 2pcs/4pcs charge port so it can charge 2pcs/4pcs controllers at the same time. And it have 2pcs/4pcs match cell packs. so no need to worry electricity problem. Features: Can charge 2pcs/4pcs controllers at the same time. It’s charge with design of impulse voltage circuit. It matched large-capacity Ni-MH cell. Simple and convenient to use. Tidiness when you put. Specifications: Color: Black, White (optional) Type: 2 in 1, 4 in 1 (optional) Package Weight: 2 in 1: 211.6g / 7.46ounces 4 in 1: 360g / 12.7ounces Package Size: 2 in 1: 138 * 98 * 48mm / 5.43 * 3.86 * 1.89in 4 in 1: 204 * 100 * 55mm / 8.03 * 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 charge, the light will turn red when it’s in charging, after full charged it will turn blue. Package List: 1 * Cell Charging Stand 2 * 2800mAh Rechargeable Cells 1 * USB CableWii Remote controller not included