SLR Revolution - The Sennheiser HD 4.40 BT offers high-quality wireless sound for every day listening on the move. The closed-back, around-ear headset features Bluetooth 4.0 and aptX compatibility to deliver true
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Headphones Sennheiser HD 4.40BT wireless, bluetooth, on-ear, microphone, NFC, aptX, black HD-440BT / HD-440BT
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Review: Sennheiser HD 4.40 BT Wireless, HD 4.50 BTNC Wireless and Sennheiser PXC 550 Wireless - Son-Vidéo.com: blog
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