Sennheiser HD 4.40BT Wireless Headset (Review)
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SCBT6 HD 4.40BT / HD 4.50BTNC User Manual_SCBT6 Sennheiser Electronic
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Pairing the headphones with a Bluetooth device
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User manual Sennheiser HD 4.40BT (English - 37 pages)
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Sennheiser SCBT6 HD 4.40BT Wireless Headphones Instruction Manual
