Sennheiser HDB 630 Wireless Audiophile Headphones (Open Box) true wireless silicon ear pieces have been

silicon ear pieces have been eliminated

pushing voice to the forefront on the biggest stages in the world

and the insulation coating is ePTFE (expanded Teflon™)

Double shielded data cable structure

• HRTF: Head-Related Transfer Function

Sennheiser HDB 630 Wireless Audiophile Headphones (Open Box) true wireless silicon ear pieces have beenHDB 630 Audiophile sound, cut loose HDB 630 with BTD 700 Bluetooth USB C Dongle included You want it all. High resolution, neutral tone, extra long battery life, flawless active noise cancellation, and of course, no more cables. Meet the closed back HDB 630. With the included BTD 700 Bluetooth USB C Dongle, you're free to enjoy glorious audiophile sound anywhere you go. Enjoy perfectly balanced audiophile sound everywhere you go Get high resolution