Rear Parking Assist System with CMOS Camera for In-Dash Monitor The CA-5040 rear parking assist system also combines camera and ultrasonic sensor technology just like the previous systems but it does not include an LCD monitor. It is designed to be integrated with an aftermarket in-dash monitor that is already in the vehicle or any monitor of the driver’s choice. The system includes four ultrasonic sensors, a 130° flush-mount CMOS camera and an audible buzzer.