Colorful TFT for back view VCD/DVD video signal connectable Show the distance to the obstacle by the numeric display combined into the TFT monitor Direction indicator(Letf & Right) Step-up display with 10 stages indicating distance to the obstacles Three colors alarm "DangDang"sound alarm 2/3/4 sensors All kinds of sensors optional Stick-on & insert-in sensor optional Diskplay size:268?90?45mm