The Wireless Parking Assist System, which includes four parking sensors that transmit a signal to an LED display mounted on the rearview mirror, can make parking much easier. It helps to detect any obstacles, animals, people, etc. Voltage - 12V, monitoring distance - from 8 and up to 79 inches, danger signal - buzzer. Supply includes - control unit, wireless display, 4 parking sensors, fasteners, (when ordering specify the desired sensor color).