The Power Base simultaneously charges up to 2 of the included 400 mAh Lithium-ion Rechargeable Battery Packs designed for your original Xbox 360 controller, using a wireless charging signal. You can charge the 2 Rechargeable Battery Packs by themselves or while connected to your original Xbox 360 controller. It also features LED charge indicators that tell you your charge status and a Power on/off button for saving energy when the Power Base is not in use. Charge from any power outlet using the included 110 / 240V AC adapter. The Power Base is the perfect charging solution for your Xbox 360 controllers.