The product is a set of OEM BMW E60 E61 Rear Parking Distance Sonic Sensors with a wire harness included. It consists of 4 sensors with a wire quantity of 1. The sensors are black in color, wired, and feature a painted finish. They are designed for placement on the rear of the vehicle and are manufactured by BMW in Germany. The product also includes a California Prop 65 Warning due to the potential presence of chemicals known to cause cancer and birth defects.