ZOSI DC 12V 2A 2000MA US CCTV Power Supply Adapter for Home Security Camera Surveillance System AC Input: 100~240V 50/60Hz, DC Output: 12V 2A 24W. Cord Length: 100cm. Connector size: 5.5 mm x 2.1 mm. These power supplies are qualified items which are ideal for powering a wide range of 12V DC items, especially for CCTV camera and DVR systems, Home Security Camera Surveillance System. Simplifying the Installation Process. Simple installation, more safety. Quality warranty, Lifetime Tech Support.