Immerse yourself in the Sennheiser HD 4.40BT Bluetooth Headphones, your ticket to an extraordinary audio journey. Powered by proprietary Sennheiser drivers, these headphones deliver a well-balanced, intricately detailed sound with dynamic bass, elevating your music experience to new heights. Immerse yourself in your favorite tunes, undisturbed by external noise, courtesy of their active noise-cancelling feature. The deep, ergonomically designed memory foam ear pads and adjustable headband ensure superior comfort, even during extended wear. Fitted with a Li-ion Polymer Battery, these headphones promise long-lasting performance. The headphones come with a protective case for easy and compact storage. With Bluetooth 4.0 and aptX technology, you can enjoy true wireless Hi-Fi sound up to a range of approximately 10 meters. For a personalized experience, the headphones are equipped with a memory card slot, allowing you to enjoy your favorite playlists without connecting to a device. Experience the perfect blend of comfort, convenience, and exceptional sound with the Sennheiser HD 4.40BT Bluetooth headphones.