CRYSTAL CLEAR SOUND -- Incorporating CVC noise suppression technology, FM transmitter efficiently reduces the background noise to deliver CD-Like quality sound with deep bass and no static. Built-In microphone with echo cancellation allows you to take hands free phone calls without distraction from driving | MULTIPLE MUSIC PLAYING MODE -- Bluetooth connection allows wireless streaming of music from portable devices. SD card slot for playing music or audio books from SD memory cards; USB port with music icon for flash drives and music playback in MP3 and WMA formats. 3.5mm Aux output for connecting to car stereo directly | BIG LCD DISPLAY -- 1.4 inch screen to better visualize phone calls, music, car battery voltage. The ideal screen size to assist you in driving safe without disturbance | TECHNOLOGY IN YOUR CAR -- Bluetooth hands free talking, Caller ID display, Pick up/dial a call by remote control, Can adjust angles, adapt for any type of autos | SPLENDID DESIGN -- FM transmitter blends in any car interior perfectly and won't take much space. Large knob ensures easy operation and keeps you from having to take your eyes off the road to change songs/volume/answer or reject calls etc