Description:1.DC power jack 5.5x2.1mm, female, 3P, and the one on the right is for mounting stability.2.You can solder leftover terminals onto the jack and then press it into your breadboard. Otherwise, good for motherboards, system boards, and other such circuit boards.3.Application to Media Player, MP3 Player, MP4 Player, Audio-Video Equipment, Note Book, Cellular Phone, Mobile Phone, Cell Phone, Smart Phone, PDA, Car Audio etc.Specification:Product Name: DC Power JackConnector Type: 5.5 x 2.1mm SocketTerminal: 3Rated Voltage: 30VRated Current: 1ADimension: 14 x 9 x 11mm / 0.55-inch x 0.35-inch x 0.43-inch (L*W*H)Material: Plastic,MetalColor: Black,Silver ToneNet Weight: 14gPackage Content:10pcs x DC Power Jack