PXC 550-IIArticle No. 508337 PXC 550-II Wireless 1 Spare Parts available BATTERY MB 660, PXC 550 Choose Spare Part Spare Parts BATTERY MB 660, PXC 550 BATTERY MB 660, PXC 550 Complexity Article No. 507271 Choose Spare Part Attention! Due to the complexity of the repair, some of the spare parts shown can only be replaced by specialist workshops. In this case, please contact your nearest Sennheiser Service Center.