Px7 S2Px7 S2's 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. 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.