Grey Music Head-band Headphones Wired & Wireless 3.5 mm connector USB connectivity Bluetooth 5.2 Circumaural Microphone type: Built-in Built-in battery Lithium-Ion (Li-Ion) Px7 S2s custom-designed 40mm drive units and 24-bit-capable wireless platform combine for a truly immersive listening experience that allows you to hear more of what the artist wants you to hear.Hear what your music really sounds likeBowers & Wilkins is trusted by music professionals the world over to deliver the most detailed, natural and immersive sound available. Our Px7 S2 headphones bring you closer to the original recording, so youll hear the music exactly as the artist intended. With 30 hours of listening from a single charge, you can enjoy the experience for over a day at a time.Sounds like no otherPx7 S2 uses custom-designed 40mm drive units, carefully angled inside each earcup for a truly focused, immersive listening experience. The result is a class-leading headphone experience.Cancel the noise, not you