PRODUCT GRADING Grade C > This item is in used condition. Visible marks & scratching of different types > Refurbished to the highest standards.  The product may not arrive in original packaging WHAT IS IN THE BOX Sennheiser HD 4.50 BTNC, Wireless Headphone with Active Noise Cancellation, Black, Refurbished PRODUCT DESCRIPTION Proprietary drivers used in the HD 4.50BTNC Wireless deliver powerful, detailed and well-balanced sound with satisfyingly dynamic bass. Listening sessions are pure joy – no matter the music genre.Wireless Freedom The HD 4.50BTNC Wireless is equipped with Bluetooth 4.0 featuring aptX codex compatibility providing wireless freedom of movement and exceptional sound quality.NoiseGard Active Noise Cancellation NoiseGard active noise cancellation virtually eliminates unwanted ambient sound. Whether on a plane, train or noisy street NoiseGard provides a comfortable listening experience allowing you to relax and focus on the music, not the noise.Instant Pairing via NFC Hassle-free Bluetooth connection is accomplished using Near Field Communication (NFC) with compatible smart devices. Intuitive Controls Intuitive ear-cup mounted controls make adjusting volume, changing tracks, and managing incoming calls via the integrated microphones a breeze.Long Battery Life Enjoy up to 19-hour battery life with NoiseGard active noise cancellation engaged and up to 25-hour battery life with NoiseGard switched off. Passive, battery-free listening mode is also possible via a supplied detachable cable when the headset is out of power.Great Wearing Comfort Soft leatherette covered ear pads provide exceptional wearing comfort for long listening sessions.Perfect Portability With its side-swivelling ear cups and a robust foldable headband design, the HD 4.50 Wireless can be easily and compactly stored in its supplied protective case. PRODUCT INFORMATION Brand - Sennheiser Colour - Black Connectivity technology - Bluetooth, wired cable included also Model name - HD4.50BTNC Form factor - Around Ear Noise control - Active Noise Cancellation Headphone jack - 3.5 mm Cable feature - 1.4m audio cable Item weight - 0.49 Pounds Control type - Volume Control