The system uses advanced digital high-definition digital camera as the capture unit, and the effective pixel is greater than 1.44 million pixels. The use of high-precision, small-angle narrow-wave speed radar as a system speed-checking forensics unit, the product supports multi-camera synchronous forensics, the system capture host unit using embedded low-power professional equipment, with hardware watchdog (monitoring circuit), combined with special software, to ensure the long-term stability of the system reliable automatic work, with multi-lane, 24 hours, Intelligent, high-definition monitoring capability, with easy installation, accurate monitoring, high degree of automation, high integration, support multi-device network law enforcement and all-weather fixed law enforcement capabilities, can be illegal speeding vehicles for effective, fast and accurate capture and evidence, while having the ability to obtain evidence in other illegal acts.