4 Input to 4 Output Video Amplifier, Product Type Video Amplifier, Compatible Surveillance Equipment Digital Video Recorders, Compatible with Series Universal, Includes Power Supply, Color Black, For Use With Multiplexers, VCRs, Video Cameras, Maximum Input Voltage 12V DC, Overall Depth 5 3/8 in, Overall Height 1 1/4 in, Overall Width 3 in, Power Source Cable, Standards NDAA Compliant