... Display indicates obstacle distances as well as orientation,2.Automatic static object determination, adaptive for all ... type of spare tire vehicles,3.Components Included: 4 sensors/ECU/ buzzer/buzzer cable/power cable,Audible ... closer the obstacle, the faster the beep frequency,4.Rated Voltage: DC12V,5.Operating Temperature: -40° ... is engaged. parking aid system with hight quality and reasonable cost