... control function,for example,when the car is in emergency brake condition,the car face body can ... can be customized1.The car face body is in round shape,the radius is 7.6cm,if you ... don't like it,we can change it in Oval ... the light beads.2.The controller is in round shape,the radius is 4cm,if you don' ... t like it,we can change the shape,and it has 5 buttons,if you want ...