1.Compliance with Bluetooth Specification Version 2.0; 2.Support Hands free Profiles and RF transmit to car radio; 3.Listen to music from your mobile and respond to phone calls-Ability to switch between music and calls made to you Bluetooth phone; 4.Wirelessly connects to most Bluetooth mobile phone; 5.Use Dsp technology,Full duplex dispose,Reduce noise and echo suppression with talking; 6.Attached USB faucet to software framework update; 7.Attached wireless headset use RF transmit technology; 8.Built-in Microphone to speaking and loudspeaker to listening; 9.Bluetooth connectivity up to 8M. Wireless headset connectivity up to 3m; 10.Support Rechargeable Li-ion Battery with built in charging circuitry; 11.Buletooth Operating frequency range in ISM band of 2.4GHz to 2.48GHz; 12.Four pcs LED nixietube display incoming call ID,The longest ID can display for 12bit, LED status indication for different mode of operation; 13.Three Buttons Control-left to record incoming voice middle-to hand on or hand up and Voice dial,re-dial last dial-up; 14.Two switch-top is power switch,underside is switch with listening by mainframe or car radio; 15.One touch switch-control to switch four FM frequency with car radio; 16.RF transmit to radio Frequency:FM88.1HZ,88.7HZ,89.1HZ,90.1HZ; 17.Wireless headset frequency:FM110HZ; 18.Connection Point-to-point ; 19Talk time: Up to 12 hr; 20.Headset Talk time:Up to 6 hr; 21.Standby time: Up to 200 hr; 22Battery: Li-ion 1650mAh; 23.Battery charger: 6V DC using in car cigar lighter; 24.Charging time: 3h;