In-Dash AM/FM-MPX MP3 Shaft Style Dual Knob Radio with USB/SD Card Am/fm-mpx/usb/sd mp3 stereo. Classic car audio replacement allows for zero dash board modification using shaft style openings. Built-in usb/sd/mmc mp3 player. 1.2 volt rca line out (amplifier line output). 2-channel output 80watts x 2 (160 watts maximum).