Specification Input voltage: 5V Input current: 1A Battery capacity: 2800mAh What You Get 1 * Charging dock 4 * Rechargeable batteries 1 * Lengthened USB cord Please NOTE: Wii Remote Controllers are NOT included! Before charging, please place the product in the right position and start charging after the indicator lights up. Charging Indicator Light Yellow means fully charged, red means charging. Easy to distinguish. USB Connection Port Comes with a USB charging cable, you can charge the Wii controller in a variety of ways, such as PC, adapter, and power bank. Control Switch Turn on the switch to start charging immediately. Anti-slip Rubber Pads There are 2 slip-resistant pads on the bottom, which can prevent slippage while charging. Comes with 4Pcs 2800 mah rechargeable batteries, which provide more capacity, save money and protect the environment compared to ordinary AA batteries