With 4-channel output, this Sumas Media SM-30BT Touchscreen Car Stereo can be used for many purposes. Please note this widescreen car stereo also includes a remote control for easy operation. Sumas Media Widescreen Touchscreen Car Stereo with DVD Player: * 3" Digital Wide Touch Screen TFT LCD Monitor * Bluetooth function, Cell phone hands free operation with built-in mic * DVD Player, compatible VCD, WMA, MP3, MPEG4, DIVX, DVD-R/-RW * Built-in AM/FM stereo receiver * Mute at telephone calling * Multi language setup for optional choices * Flip down detachable panel with carry away caddy * SD/MMC Card, USB Port/Slot * 50W x 4 peak output Power and one Subwoofer output (RCA) * One rear camera image input (RCA), one rear video output * 96khz/24bits Audio DAC (Advanced Multi-bit DAC) * 4 Channel output * This Widescreen Touchscreen Car Stereo includes remote control for optional easy operating