G-Cord Bluetooth 4.0 Wireless Sport Headphones for iPhone, iPad, Samsung Galaxy and Other Bluetooth Enabled Devices Bluetooth 4.0 version provides high-fidelity stereo music and clear speech within 10 meter 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 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 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