G-Cord (TM) Bluetooth 4.0 Wireless Stereo Noise Cancelling Headphones Sport Sweatproof In-Ear Earbuds for Apple Watch, iPhone, Samsung Galaxy and More (Black) Lightweight, extremely comfortable and fit securely in your ear. The best companion for running, jogging and other exercise Noise cancellation technology intelligently filters ambient noise to ensure clearer sound formusic playing and calls Easy Access.The simple user interface on one of the earphones allows you adjust the volume, play/pause, select songs and answer/hang up calls completely effortlessly. Bluetooth 4.0 version provides high-fidelity stereo music and clear speech within 10 meter compatible with most Bluetooth-enabled Smartphones, up to 8 hours of talk/playing time and 320 hours standby, let you enjoy your music through a variety of activities