The item is a 40cm long simple and practical 1 to 4 dc power splitter cable, which features one female 2.1*5.5mm jack and 4 male 2.1*5.5mm plugs, and designed for cctv security camera, led strip lights and other home electronics needing dc power. the dc power y adapter cable is a convenient and cost-effective way to power up to 4 cameras from one central power adapter.