Voucher (6 months’ TIDAL Premium music streaming free of charge, worth $59.94) is valid only in conjunction with the purchase of one or more of the following products: MOMENTUM Wireless, PXC 550 II, HD 660 S, HD 660 S Apogee, IE 80 S BT, or IE 80 S. Voucher is not valid for products other than the aforementioned nor for products distributed as part of a range of special offers open to staff and students, or products from Sennheiser Outlet or accessories. The campaign is effective as of March 24th, 2020 for the United States and is valid only in the US Sennheiser online store, for as long as stocks last. This excludes Sennheiser stores and brick-and-mortar trade. The voucher cannot be used in conjunction with other voucher campaigns. The vouchers will be delivered as of March 26th, 2020 by email in the form of a digital code. Should the product or products purchased be returned, the voucher will be cancelled and will lapse. The voucher is not exchangeable for cash.