Shure SBC441-US - 4-Bay Docking Station for Axient Digital PSM (with Power Supply)Power supply included. Add another SBC441 later on, powered from a single power supply unit. The SBC441 4 Bay Docking Charger supports up to four Axient Digital ADXR Wireless Bodypack Receivers or Shure SB910 rechargeable batteries. The SBC441 includes dual network ports for monitoring and network pass through. Compatible with both Shure SB910 rechargeable batteries and Axient Digital PSM ADXR bodypack receivers, the SBC441 desktop networked charger