... button , 1st channel ,when pressed,the first channel by gradually bright to maximum, and the other two channels to be shut down;A01A01 ... ,2nd channel ,when pressed,the second channel by gradually bright to maximum, and the other two channels to be shut down;A02A02 ... : 3 button, the 3rd channel when pressed,the third channel by gradually bright to maximum, and the other two channels to be shut ...