This cable assembly is designed to split a CCTV power line into eight outputs. The source end uses a male DC connector, while the outputs have female DC connectors. Each DC connector has an outside barrel diameter of 5.5mm and an inside pin diameter of 2.1mm. The cable on each side of the split is about 7 long, with a total assembly length of about 16.*** 30-day easy returns. No restocking fee. Free lifetime technical support. Limited lifetime warranty. ***