G-Cord Bluetooth 4.0 Headphones Sweat-Proof Wireless Stereo Sport Headsets for iPhone, iPad, Samsung Galaxy, Tablet and More Durable and sweat proof, ideal wireless earbuds for the Gym, Hiking, Cycling, Jogging, Climbing without annoying cables, locks-in stabilizers offer secure fit for sports and fitness Skip free with G-Cord Bluetooth signal enhance technology even put them in bag or in a pocket Ergonomically designed, compact and lightweight in-ear earbuds for comfortable wear, 3 soft silicone rubber eartips (S/M/L) to fit your ear shape and size and reduce external sound Bluetooth 4.0 version provides high-fidelity stereo music and clear speech within 10 meter G-Cord headsets are compatible with most Bluetooth-enabled Smartphones, up to 8 hours of calling6 hours music playing time and 160 hours standby, let you enjoy your music through a variety of activities