INPUT USB Slot / SD Card Slot To Play mp3 Tracks from SD Card (Class4 Recommended) Auxiliary 1 Screw terminal 0.2…2 mm2 Auxiliary 2 Screw terminal 0.2…2 mm2 FM Radio FM Radio IC with Antenna OUTPUT Stereo amplified output 2 25 Watt / 8ohms Auxiliary output Variable Stereo RCA Plug Output REACTION TIME Approx. 20ms MOUNTING Din Rail Din Rail Standard