Features: for DC male-to-male power extension cord: for DC plug size: 5.5mm x 2.1mm, outer diameter 5.5mm, inner diameter 2.1mm; there are four lengths to choose from. DC12V line: for DC line is suitable for 0-12V equipment, such as ED light bars, LED signs, CCTV surveillance cameras, automotive electrical appliances, automotive power amplifiers, automotive wiring harnesses, circuit boards, etc. 3FT DC: The for DC power cord is 1m long (about 3FT), which is enough to complete most of the projects. The wiring is simple and easy to use. Safe and durable: The PVC sheath can protect the internal conductor and provide flexibility to the cord to ensure a long life. Lightweight and easy to carry Note: This line has only two wires, which can only be used for power supply, and does not support data transmission Specifications: Material:Plastic Color :Black Size1: Approx.200cm/78.74inch Size2: Approx.100cm/39.37inch Size3: Approx.50cm/19.69 Size4: Approx.30cm/11.81inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xPower Cable