Sennheiser Sydney - Enhance your auditory learning with Sennheiser's HD 4.40 BT. The HD 4.40 BT supports aptX compatibility to deliver true Hi-Fi sound with satisfyingly dynamic bass and allows you to
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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Original Sennheiser HD 4.40BT Wireless Bluetooth Headphones Over-ear Hi-Fi Headset Noise Cancelling Headphones Foldable with Mic
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