Main Features: ?? Bluetooth V4.1 connection, enjoys favorite music through wireless technology. ?? Built-in microphone, support hands-free phone conversation. ?? Multipoint connection: it can simultaneously connect two smartphones. ?? In-ear design provides good noise isolation for clearer sound. ?? Built-in 45mAh battery, long stand-by time and music time. ?? Magnetic charging, convenient to use. ?? Small and lightweight, easy to carry.