Modular Charging Station is an easy way to dock and recharge 2 Xbox One(tm), Wireless Controllers. It comes with two NiMH rechargeable battery packs that can be dropped and charged. The Modular charge station is powered via one of USB ports located on the back of console. This leaves all other ports available for use. Modular Charge Station adapts to Xbox One(tm), saving space. Includes two NiMH battery covers and two rechargeable NiMH Batteries for drop-and-charge functionality Compatible with Microsoft Wireless Controllers for Xbox One (tm). Charges up to 2 Xbox One Elite Controllers simultaneously.