10.4mm + 6mm Dual Driver + LHDC 5.0 – Best-in-class sound with deeper bass and clear vocals Sliding Volume Control – Slide on earbud surface to increase or decrease volume intuitively 49 dB Adaptive ANC – Advanced noise-cancellation chip for fully immersive listening Dual Connection – Simultaneously connects to 2 devices for quick and seamless switching 44 Hours Total Battery + IP55 – 10-min fast charge for 7 hrs playback; sweat and rain resistant