DC power plug for CCTV A DC power plug for a CCTV system is a vital component that ensures the security cameras receive a steady and reliable supply of power, enabling them to operate effectively around the clock. These connectors typically come in different sizes, with the most common being the 2.1mm or 2.5mm barrel plug. They are designed to be easy to connect and disconnect, providing a convenient solution for powering both individual cameras and entire surveillance setups. Ensuring the correct voltage and amperage for your particular CCTV system is crucial, as mismatched power specifications could lead to malfunction or damage to the equipment.