Our company has been cooperating with Guangzhou Hongda, and their dynamic monitoring products are produced by our own factory. The price is good. They are all based on embedded development, ARM architecture and liunx system, which are stable and durable, and the product installation and debugging feel quite simple.
Other second-hand Jinheng Intelligent, Boda Kong Tong, Anzhiyuan and Rong Zhi have different characteristics.