JBL Signature Sound Nothing beats incredibly clear music and calls from 11mm dynamic drivers powered by JBL Signature Sound. True Adaptive Noise Cancelling with Smart Ambient True Adaptive Noise Cancelling automatically adjusts to your surroundings, eliminating distractions for better sound wherever you are. Or use Smart Ambient when you need to focus on your environment, all without removing your earbuds. 40 (10+30) hours of playback with wireless charging Never miss a moment with 40 hours of Qi-compatible battery life (including 10 hours in the earbuds + 30 hours in the case). Need a boost? Just 15 minutes of Speed Charge gives you another four hours of playtime—fast. 6 mics for effect calls with zero noise