This item is compatible with for Wii controller. It has 4pcs port so it can 4pcs controllers at the same . And it have 4pcs cell packs. so no need to worry electricity problem.

Features:
Can 4pcs controllers at the same .
It’s 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 DC5V into input port, is blue (If you no need decorate , please turn switch to “off”. If you need. turn to “ON”)
2. Please put 1-4PCS matched cells in controller for charging, the will turn red when it’s in , after full it will turn blue.

Package List: H27313
1 * Cell Stand    
4 * 2800mAh Rechargeable Cells    
1 * USB Cable( Remote controller not included)