3M Peltor Rechargeable Battery Pack (bul) Complete with one wall transformer and one battery pack (bul) 2.4 Volts, 1200mAh (bul) Ni-MH battery pack (bul) Compatible with Alert, Workstyle, TacticalPRO, PowerCom, PowerComPLUS, LiteCom series headsets 3M is Leading the Advancement of Hearing Conservation(TM)