If you need to connect a battery pack or wired power supply to a board that has a DC jack this adapter will come in very handy! There is a 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)

Application:

Arduino power jack.
Microcontroller trainer power jack.
Bread Board power supply jack.
CCT camera power connector.

Features:

• Hard Plastic Strain Relief: 5.5mm Inner Diameter x 22mm Length
• Contact Material: Nickel-plated Copper Alloy
• solder less