4 Sensor Ultra Sonic Back-up System, 4-Black Sensors, 2- display options and piezo
Blind Spot Sensor Kit Microwave 2 sensor 79GHZ
Blind Spot Sensor Kit Dual Ultrasonic Sensor Alert System, with Additional Digital Display
Dual Sensor Ultra Sonic Alert System, with Illuminating Indicators .
4 Sensor Back up kit with Ceiling Headliner Mount Display.