STRONG FUNCTION & EASY OPERATION: One multi-function button to answer, reject, hang-up, redial, mute of calling, convenient for safe driving, business working. With smart functions of incoming calling number voice prompt, one to two devices connection, re-connection, active Siri/ Voice assistant.It can switch languages: English and Chinese. | SUPERIOR CALLING & HD SOUND: Bluetooth 4.2 technology, equipped with CSR chip and APTX provide crystal clear, true sound and strong signal, no pressure for smooth calling and listening to music, news. And noise cancellation Mic suitable for various environment speaking. | SUPER LONG BATTERY USE: Up to 320 hours super long standby time, up to 12.5 hours of calling, up to 11.5 hours of playing music, which overcome the difficulty of battery shortage during the business trip,driving,meeting,traveling. | WIDE COMPATIBILITY & COMFORTABLE WEARING: Wide compatible with tablets, iPhone, Android cell phones (Samsung, LG, Motorola) and other bluetooth devices. And durable soft rubber, various ear buds size, ergonomic radian design make stable and comfortable wearing for left or right ear. | WARRANTY & SUPPORT: Support 12-months warranty and 1-month free returning and replacement, if any unsatisfied or problem, be free to consult.