This splitter cable allows you to power 4 cameras with one power supply. Of course, you have to make sure that your one power supply has enough amperage to power your cameras, and be sure to also account for the voltage and amperage drop (power drop) in your cable run. The DC connectors on this cable are standard 2.1mm for professional security cameras and DVRs. The input connector is DC Female and the output connectors are DC Male.