1) Auto adjustable voice2) Bluetooth 1.2 edition, which supports ear-phone and free-hand answer the call3) With charger4) Digital signal processing that can import better communication5) Many colors for LED light in order to display the condition of Bluetooth, battery and charger6) Match with easy button of Bluetooth7) You can choose USB digital line for charger by computer8) Modern outlook, nice design9) The longest talking time for 7 hours, using time for 200 hours10) Voice dialing, exchange talking, waiting talking, redialing and refuse receive the call11) The net weight less then 10g, and width less then 4cm producing area:China