1. Digital LED showing obstacle distance
                        2. Alam by BI-BI sound
                               3. LED display with two colors(Red&Yellow),it is installed at car rear roof,you need to turn your head back to see the display when reversing
                           4. Crescent shape digital display screen
                                  5. Sound on/off optional.                                                                      
                                 6.2-8 sensors are available.