V.one Sport Bluetooth Headphones with Mic Noise Cancelling Neckband Wireless Sport Stereo Earbuds for Running Exercise Gym Support Android IOS Smart Cell Phones 1.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, V.one S5 offers a perfect balance of bass and treble 2.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 3.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 4.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 5.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, V.one S5 could withstand heavy perspiration from workout activities