The WB-2000-2 (containing 2 pieces) is an AA nickel-metal hydride (Ni-MH) rechargeable battery pack designed for exclusive use with the WM-5225 and WM-5265 Wireless Microphones, WM-5325 Wireless Transmitter, and WT-5100 Portable Receiver

• AA nickel-metal hydride (Ni-MH) rechargeable battery pack designed for exclusive use with the WM-5225 and WM-5265 Wireless Microphones, WM-5325 Wireless Transmitter, and WT-5100 Portable Receiver