【Seamless Connectivity】: The Long DC Extender Cord size is 2.1mm x 5.5mm female socket and 2.1mm x 5.5mm male plug. The inner diameter is 2.1 mm and the outer diameter is 5.5 mm, ensuring a safe and reliable power connection. | 【20AWG Copper Wires】: Featuring 20AWG bare copper is designed to security camera. Compared to 21AWG/22AWG, it has superior performance and ensures signal stability for long cables. At the same time, it can withstand the worst weather conditions, has a lifespan beyond imagination, and provides clear images at any time. | 【Friendly Design】: 2 Pack DC 5521 male to female supply cables, bundled with the 25 cable clips for Free, which can fix your cables to the wall and floor, making long cable management very convenient. Multiple length extension cables can easily expand your coverage range and meet your unique length requirements. | 【Widely Compatibility】: Suitable for various security cameras or other products equipped with 5521 plug. Such as CCTV security cameras, standalone DVR/NVR systems, routers, LED light strips and more. In addition, It harmonizes with varying voltage levels of 9V, 24V DC/AC equipment. | 【Reliable Service】: We hope this product can create a perfect experience for you and offer a one-year warranty for this cable. If you have any questions about our products, you can contact us at any time, and our professional customer service will reply within 24 hours.