User manual Sennheiser MB 660 MS (English - 37 pages)
Sennheiser MB 660 UC - Dual-Ear Headset with Noise-Canceling Microphone - Includes USB Bluetooth Dongle | Headphone Reviews and Discussion - Head-Fi.org
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Bolsa de transporte para Sennheiser MB 660 e PXC 550 - 507228 | MSTORE