1. 4 sensors install in bumper and detect obstacle distance;                   2. New color LED display for the digital and direction;                         3.Wireless function, there are not any wire between the main box and the display , DIY install;                                                                4.The simulative vehicle is displayed for front and rear , left and right ;                                                                                          5.Alarm by Bi-Bi sound;                                                                  6.Full-weather design, un-affected by wind,ice,snow&rain.