This adapter has a female 2.1mm x 5.5mm DC plug on one side, and a screw terminal block on the other. You can plug it into any DC power source that has a male 2.1mm x 5.5mm plug, such as a wall wart or a battery pack. Then you can attach the wires from your device to the screw terminals, which are clearly marked with positive and negative signs. No soldering or crimping required!
Material silicone cord + copper core + buckle alligator clip Features Length: 50cm; 2 alligator clip in each thread Application test wire connecting cable Packing List 10 x Alligator wire clip Brand: Other Type: Cable Accessories