Quality: Double Layer (Injection Moulding) Provide Best Polarity Connection and Insulation (see picture 2), DC Electrical Connector connect wire lead end to a DC 2.1 x 5.5 mm port *****Brand: Leading Source of High Quality 2.1 x 5.5 mm Male Female Extension Electric Plugs (see picture 3) *****Installation: Tight Screw on Terminal | No-Soldering/Crimping Needed | Easy to Install (see picture 4) | 2.1 mm x 5.5 mm 5.5 x 2.1 mm 12volt 12vdc barrel adapters jacks*****Application: For 5V 12 V 24 V 36 V vdc Volt Power Supply | CCTV Cable Connection | Led Strip Extention | Video Balun | Security Tailgat Camera | DIY Board | 2.1 x 5.5 mm Connectors (see picture 5)


