The BSSK4000 Backup Sensor System is a new 6 sensor kit for buses, trucks and large vehicles. The heavy-duty kit is hardwired, and consists of 4 bumper sensors, 2 roof sensors, a driver display, and an ECU. The backup sensors are strategically placed on the vehicle’s rear bumper and roof for optimal coverage. The roof sensors are ideal for backing into loading docks and other areas with low hanging entrances. The ultrasonic sensor technology detects the distance between the vehicle and rear obstructions. The distance is indicated on the digital driver display and alerts the driver with escalating audible and visual alerts when the vehicle is too close to an object. The BSSK4000 system is hard wired for immediate real time performance with no latency. The sensors and control unit are fully sealed and weather resistant.