* DSP technology,full duplex, noise and echo cancellation * Bluetooth specification: 1.2 * Built-in microphone and loudspeaker. * Super brighr LED display panel for incoming call indication. * Voice dial & Redial. * Record important information during conversation. * Wireless headset, convenient for private conversation at anytime. * FM FREQUENCY SELECTION KEY: select between 4 preset FM Frequencies(FM88.1, FM88.5, FM88.7, FM89.4) to tune in your CarAtereo and listen to your call. * USB PORT: for firmware upgrade only (The traffic regulations in all countries and areas around the world stipulate that DO NOT USE THE MOBILE PHONE WHILE DRIVING)