The DP Audio 3 Video and MP3 Receiver (DR304) is a multimedia essential for the music and car stereo enthusiast. The large three-inch display is ideal for watching videos and movies. Listen to your favorite music loud and clear thanks to the powerful 52W x 4 output. The USB connection and SD card slot provide a variety of media playback options. Get more entertainment options with the DP Audio 3 Video and MP3 Receiver (DR304). Hook your Smartphone or MP3 Player up to the Auxiliary Input tune into your favorite FM radio station or plug into the USB and SD ports for more choices. You can also charge USB devices with the USB port. The Aux Input allows you to connect to the audio output of an external device such as an MP3 Player or Smartphone so you can enjoy your music through your system. Conveniently connect an external monitor s RCA inputs directly to this unit. A video signal amplifier is recommended when connecting to multiple video monitors.