Shure's SBC200US is a Dual Docking Charger for the company's SB900 lithium-ion rechargeable batteries and P9RA, P10R, and ULX-D digital wireless systems. The SBC200US ships with a power supply; and you can dock up to three SBC200 chargers - without power supplies - and charge up to eight batteries at the same time. You can charge the batteries by themselves, or installed in beltpacks and handheld transmitters. If you've got a Shure digital wireless system, go rechargeable, with the Shure SBC200US!