This is an effective regulation material used when implementing traffic control at construction sites (Type 2 security operations: traffic guidance security). It supports the safety of security personnel and construction sites with impactful electronic signs. By rotating and storing the display section, it allows for safe movement without obstructing rear visibility. <Advantages of having a dashcam> - Recorded videos can be used as materials for safety training. - It serves as a deterrent against unsafe behavior by site personnel. - Evidence is preserved in the event of accidents, property damage, or theft on site.