Job Lot of 10x Faulty Sennheiser PXC 550 Wireless BT Noise Cancelling Headphones

Sennheiser PXC 550 Wireless BT NoiseGard Adaptive Noise Cancelling Headphones Product Code 506514. These Units Do Work When attached via Audio Cable to Another Device. Noise cancelling is most effective for repetitive low level frequencies (like engine noise) but will not block higher level frequencies (like people talking) as much as these frequencies are needed to allow sound to work in the headphones.

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