Jabees BSport Bluetooth V4.1 Sweatproof Waterproof Sports Stereo Headphones with NFC ATPX for Running Jogging And Earhook - Black Bluetooth V4.1 Class II: More secure and stable connection. Less power consumption. Multipoint connections with 2 phones. Battery indicator on iOS devices. Voice prompt available in English. Perfect for Workout: Comfortable, stable, and sweat proof. Built for action. Fits comfortably in your ear and stays fit for all levels of exercise. The easily accessible on-ear control lets you keep moving while you control your music or calls Sweat Proof IPX4 Rating: You can rely on BSport to work as hard as you can under any circumstances. (rain, sweat, and even the splash of a sports drink). Universal compatibility with almost all the Bluetooth-enabled devices. With removable earhook and cable cinch to make sure the Secure-Fit. Supports aptX for CD-quality sound and superb bass resonate; The built-in NFC tag for fast connection. With dual-mic for noise and wind reduction. 12-Month No-Matter-What Warranty. Get replies from our Friendly Customer Service Team in 24 hours.