Features: DC5.5x2.1mm cable, double parallel designing, can connect two devices simultaneously, convenient and practical. Power polarity: The black wire is connection to the negative electrode, while the other wire is connection to the positive electrode. The direct current head is internally positive and externally negative, with a current of 10A, and the load supports power usage within 120W. Double color wire, easy to distinguish and connect. Suitable for LED light, headlights, monitoring, desk lamp, electronic fish tanks, mobile power supplies and other equipment. Specifications: Material: ABS+Metal Type: 5.5x2.1 female, 5.5x2.1 male (optional) Length: about 30cm/11.81inch Specification: 18AWG 2x0.75mm² Package Includes: 1pc 18AWG DC5521 Cable note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.