Bluetooth v4.1 Wireless Headphones Earbuds[Gym/Running/Exercise/Sports/Sweatproof] for Bluetooth Android Smart Cell phones/Device, Buil-in Mic Headphones(green) With Advanced bluetooth v4.1 and apt-X tech, the headphones ensure high-fidelity stereo music and clear speech within 10 meters,5 hours of continuous talking /music time; easy and fast pairing with smartphones, tablets and other Bluetooth enabled music devices Noise Cancellation technology reduces outside noises, enable clearer sound from microphone, you get high quality, hands-free phone conversation even on the street or inside shopping mall. Comfortable and secure design fits perfectly to your ear; the cable smartly stays out of your way when running, jogging or exercising compatible with Bluetooth enabled devices such as most PC, PAD,Smart Phone. Simple user interface on one of the earphones allows you adjust the volume, play/pause, select songs and answer/hang up calls completely effortlessly.