JBL Deep Bass Sound A hefty 12mm driver delivers JBL Deep Bass sound so you don’t just hear the music, you feel it. Comfortable fit with Open-Ear Design 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 Flex are equipped with 4 microphones, so you’ll always be heard with perfect clarity. Never hesitate to take or make a call again. And with VoiceAware, you can choose how much of your own voice to hear by controlling the amount of mic input routed back into your earbuds. Up to 32 hours of Battery Life Never miss a beat with 32 (8+24) hours of battery life or 6 hours, plus 18 hours in the case when noise cancelling is engaged. Need a boost? Speed Charge for just 10 minutes to get 2 hours of playtime. Water Resistant & Sweatproof Don’t be deterred by bad weather. Thanks to IPX4 water resistance and sweat proofing, there isn’t a workout or downpour the Tune Flex can’t handle. All-Day Fit & Comfort Never be without your music. The stick open design ensures comfort without pressure and natural sound awareness. Additional Sealing tips in 3 sizes together with the Sealing Ear tip mode in the App allow you to create environmental sound sealing without compromising the light, sleek design of these earbuds. JBL Headphones App The JBL Headphones App lets you enjoy your music your way. Customize your listening experience and the touch control gestures, find your earbuds, control the environmental noise and the Smart Audio & Video modes. Download the App for free and discover how much more you can do.