JBL OpenSound technology - clear, dynamic music. Enhanced dynamic sound - smooth, balanced sound with adaptive bass boost. Designed for all-day comfort with soft silicone and memory wire. 4 Mics for crisp, clear calls and minimized ambient noise. Up to 32 total hours of playtime - 8 hours each earbud + 24 with case. Customize your experience with the JBL Headphones app. IP54 water and dust resistant. Dual connect and sync with Fast Pair. Multi-point connection - pair two Bluetooth devices simultaneously. Adapter and charging cable NOT included.