The mainland camera works in front of the Yinhe Imperial Palace in Wu 'an. Surveillance cameras are mainly used for a series of security activities such as security inspection, real-time monitoring, investigation and evidence collection. Monitoring installation requires high-definition cameras, monitors, routers, video recorders, power cables, network cables, camera brackets and other accessories. There are many kinds of cameras, each of which is divided into indoor and outdoor. Under the same conditions, the definition indoors is higher than that outdoors. If you use it indoors, buy a round-headed net with a wide field of vision.