Features: Male and female DC5.5x2.1mm power cable connection wire, with 14AWG, length approximately 30cm, easy to use. Pre peeled and tinned, easy to solder and install, connected to terminals or wire nuts. The DC5521 power pigtail connector provides excellent and reliable direct current power connection. Power polarity: positive and negative inside the direct current hole, with the red wire connected to the positive electrode and the black wire connected to the negative electrode. Strong compatibility: compatible for portable storage device box, energy storage power supply, monitoring, desk lamps, routers, LED light strip, electric piano, electronic keyboards, speaker and other equipment. Specifications: Material: PVC Type: Male, Female(optional) Length: Approx. 30cm/11.8inch Outer Diameter: 5.5mm Inner Diameter: 2.1mm Wire Gauges: 14AWG / 2x1.5mm / OD=6.00mm Note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 5Pcs DC5521 Power Cord