This is the latest released blue tooth devices with creative design: 1.Stereo Bluetooth headset can remote host music player on previous song the next song play/pause 2.Volume under the music playback function by "*" "#" to control the volume. 3. Full keyboard design is exactly the same with mobile phone buttons looks like a mini mobile phoneanswer reject (operational dial telephone); 4.Synchronous mobile phone address book: has dialed received missed call query; 5.Can synchronize with mobile phone number by manipulating the sync contacts function can support up to 250 telephone number stored in the Bluetooth dialer; 6.Can be set up DIY product Bluetooth name; 7.Keyboard lock function can be set up. 8.Prevention function when the mobile phone with Bluetooth headset distance Bluetooth disconnected dialer automatic warning sound