Surveillance electronics refer to the circuit modules, signal processing units, video acquisition boards, access control circuits and alarm sensing components used in fixed security cameras, mobile surveillance devices, smart security gateways, access control systems and industrial monitoring hubs. It adapts to harsh environments such as outdoor exposure (-40℃~75℃), high humidity, dust, thunderstorm surge and vehicle vibration, and is the core hardware support for ensuring real-time video monitoring, intelligent analysis, safe access control and long-term stable operation of surveillance systems.