Bluetooth specification: 2.0, range 0 to 10m Complete Bluetooth wireless installation USB port for software update and charge Solar charging, stick on the windshield to charge DSP technology, full duplex, noise and ECO suppression With 600mAh Li-ion battery to provide typical standby time of more than 5 days, talking time of 6 hours Built-in high intelligent microphone and powerful speakers Can scroll the 10 groups of incoming calls and store 200 groups number then call back Super bright LCM caller English name display and caller ID Answer/end/reject a call, voice dialing, last call redialing, and call switch