The EMB URAI411 4-Channel Controller is a deck controller designed for DJs. With four channels, this controller allows for controlling up to four separate sources of music during performances. The EMB URAI411 model offers a compact and efficient design for DJs looking to enhance their performances with a reliable and high-quality deck controller.Unit does not power up..have not opened...may have blown capacitors,fade caps and knob buttons removed,bid accordingly,ask questions