JBL Pure Bass Sound Smartly designed 6.0mm drivers enhanced by the stick form factor deliver JBL's Pure Bass Sound so you'll feel every pulsing beat. Active Noise Cancelling with Smart Ambient Hear more of what you want, less of what you don't. Active Noise Cancelling technology with 2 microphones lets you minimize audio distractions. With Ambient Aware, you can tune into your surroundings at any time so that you feel safer when you're out in the world, while TalkThru lets you stop for a quick chat without having to remove your headphones. 4 mics for perfect calls Enjoy hassle-free, hands-free calls in stereo. The Tune 230NC TWS are equipped with 4 microphones, so you'll always be heard with perfect clarity. Never hesitate to take or make a call again. With VoiceAware you can control the amount of mic input routed back into your earbuds and choose how much to hear of your own voice. Key Features Never miss a beat with 40 (10 + 30) hours of battery life or 8 hours, plus 24 hours in the case when noise cancelling is engaged. Water resistant and sweatproof thanks to the IPX4 rating. The Stick Closed design ensures comfort without pressure, eliminating ambient distractions with a lightweight design. Customize your listening experience with the JBL headphones app.