【Overview】 Standard DC barrel 5.5 x 2.1mm specification. This is a red and black 2-core lead wire type that allows direct wiring between the power supply side (male) and the device side (female). Convenient for power extraction, extension, and operation checks of LED strips, surveillance cameras, and various DC devices. 【Set Contents】 ・DC male plug + red and black lead x 2 ・DC female jack + red and black lead x 2 (Total 4 pieces / 2 pairs) 【Specifications】 ・Plug / Jack: Outer diameter 5.5mm, inner diameter 2.1mm ・Lead wire: Red = +, Black = - (for center-positive devices) ・Cable length: See photo 【Notes】 ・5.5 x 2.1mm. Not compatible with 5.5 x 2.5mm. ・Be sure to check the polarity before connecting. ・Not suitable for high current applications. Please use up to DC12V. ・The wires are thin. Please be careful as they are easily cut when stripping. Please feel free to ask any questions in the comments. Multiple sets are also available.