Superex S5 Bluetooth CSR4.0 Wireless Stereo Headphones with Mic Sport Bluetooth Earbuds Sweatproof Running Gym Exercise Earphones for Iphone, Android, Samsung, Smart Phones Bluetooth Devices Advanced Bluetooth 4.0 version provides high-fidelity stereo music and clear speech within 33 feet/10 meters.No matter what music genre you listen to, Superex S5 offers a perfect balance of bass and treble The behind-the-neck style prevents it from hitting the ground even if they fall out of your ears ,ideal wireless earbuds for the gym, hiking, cycling, jogging, climbing without annoying cables, firmly attached earbuds offer secure fit for sports and fitness Ergonomically designed, compact and lightweight in-ear earbuds for comfortable wear, 3 soft silicone rubber earplugs of various sizes(S/M/L) to fit your particular anatomy and block outside sounds very well Quick and Easy Pairing - Just push the button on the right-hand earbud and give it about 5 seconds the first time,your phone will discover it right away. Durable and sweatproof Designed, Superex S5 could withstand heavy perspiration from workout activities Compatible with most Bluetooth-enabled Smartphones with built-in rechargeable Grade A polymer large capacity battery, lasts up to 8 hours talking time,6 hours music time and 150 hours standby time, never worry about it running out of juice