7" high-definition 1080P quad screen monitor, can display up to 4 screens at the same time, can use different split modes according to different usage scenarios, from 1 screen to 4 screens, each channel is equipped with a trigger line, DVR function is optional, can record video clips, providing a reliable solution for capturing important moments in the driving process, Its multi-channel capability makes it ideal for vehicles that require monitoring of multiple cameras at once.