Unique design with magnet function which prevents the wire and two heads of earphone twine together. Fashionable in-ear style earphone, specially convenient for wearing when doing sports. Adopts advanced BT4.1 technology, easy to connect with most BT-enabled smartphones. Easy to adjust volume, switch music and answer/hang up the hands-free calls. Perfectly fit to your ears, comfortable to wear for a long time. Supports voice switching in English/Chinese. Supports incoming calls voice broadcast for not missing any important calls. Supports last number of redial/operating voice prompts function. Supports voice software like WeChat/car navigation/QQ. Supports for IOS system showing the battery power. A good choice for you to enjoy wonderful music and convenient hands-free calls.