SHURE SB900B презареждаема батерия - rechargeable batteries for QLXD, ULXD, PSMCompatible with Axient Digital (AD1, AD2 & AD3), ULX-D and QLX-D Wireless, and PSM 1000, PSM 900, and PSM 300 Personal Monitoring systems. Automatic safety shutoff when the battery reaches an internal temperature of 60 d..