The USB port of this unit allows you to dock your iPhone, and you can search through your music library using your voice (with the included mic). You just say the name of the artist and album and the content will be launched. You can also make hands-free Bluetooth calls with the Asteroid. As soon as you connect your Bluetooth the Asteroid automatically synchronizes the phonebook of the mobile and directly associates an user-independent voice recognition tag. This detachable faceplate unit is equipped with backlight buttons and a guiding system to insert the faceplate. For sound output, the Asteroid is equipped with a 4x55W built-in MOSFET amplifier, a subwoofer output and 6xRCA preamp-output. This unit also includes an equalizer with sound effects. The Parrot Asteroid car A/V head unit is equipped with an SD card slot.