JBL Signature Sound The legendary JBL Signature Sound as found at concerts, in the studio and in the home is now available in a headphone. 10 Hours battery life - 2 Hours recharging time with speed charge Enjoy long-lasting fun and fast recharging thanks to best in class 10 hours of play time and 2 hour charge. A 15-minute recharge provide an extra hour of battery. Ambient Aware and TalkThru Technology Don t let the music stop! Stay in touch with your surroundings while listening to your tunes. A touch of the Ambient Aware dedicated button increases the ambient sound and lets you hear what s happening around you. The TalkThru mode drops the music level down, allowing you to talk to your friends without removing your headphones.