2.1mm Barrel Type Male DC Power Jack

This 5.5mm/2.1mm barrel plug (male) to screw terminal will come in very handy if you want a DC power connector that runs off a battery pack or wired power supply. There is a 5.5/2.1mm DC plug on one end, and a screw terminal block on the other. The terminals are labeled with positive/negative assuming a positive-tip configuration (which is the most common). Simply hook up your selected power supply to the terminal points and you have DC power Plug with the output of your choice!