Adaptive Noise Cancelling with Smart Ambient: Enjoy the soundtrack of your life. Four noise-sensing mics minimize distractions and maximize audio quality, while Smart Ambient keeps you fully aware of your surroundings and helps you talk with the people around you without taking out your headphones. Use the JBL Headphones app to set your custom levels. IP68 water and dust proof: Sweat, rain, salt water, and sand? Sounds like a great time. JBL Endurance Peak 4 earbuds carry an IP68 waterproof and dustproof rating, so they can withstand it all. Not to mention high temperatures, high humidity, or long-distance drops. Secure fit with TwistLock design: You might even forget you're wearing them. JBL OvalTubes with TwistLock stay in your ears all day without discomfort. The liquid silicone ear hook with memory wire is comfortable and adaptable to different sizes. JBL Pure Bass with Spatial Sound: Enjoy rich, clear JBL Pure Bass sound from our 10mm dynamic driver, delivering powerful stereo sound with deep bass for an immersive audio experience. Customize your sound to the way you are with Personi-fi 3.0. Take a quick earing test and adapt your audio to your personal features. 6 mics for perfect calls: Three mics per ear effectively capture your voice while suppressing noise from other sources. Meanwhile, the beamforming algorithm minimizes unwanted ambient noise, making your authentic voice more intelligible. The windproof design significantly reduces distortion from air friction and gives you a crystal-clear call experience—even in the middle of an outdoor run on a breezy day.