Especially designed for car audio system, easily answer phone calls and for smooth audio chatting; Supports next / last song selection, volume adjustment, play / pause, redial calls; Enjoy your wireless music life anytime; Bluetooth v3.0 technology, supports two cell phones connection at the same time; Easy operation, makes normal speaker into Bluetooth speaker immediately, suitable for car system; Super long receiving distance, up to 20m in open filed; Super clear talking effect, smooth audio chatting; USB power supply; Built-in battery, rechargeable and with longer working time; Supports cell phone, computer, IPHONE, IPAD, MID etc digital products with Bluetooth function.