?Note?this cable contains only two wires, which can only be used for power supply and does not support data transmission. ?Safe and durable?PVC sheath can protect internal conductor and provide flexibility for flexible cord to ensure long life. It is light weight and easy to carry. ?3FT DC5521?The 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. ?DC12V cable?DC5521 cable is suitable for 0-12V equipment.Such as ED light bars, LED signs, CCTV surveillance cameras, automotive electrical appliances, automotive amplifiers, automotive wiring harnesses, circuit boards, etc. ?DC5521 Male to Male Power Extension Cable?DC plug size: 5.5mm x 2.1mm,outer diameter 5.5mm, inner diameter 2.1mm.