automobile modification, equipment, computer modification, access control switches, CNC machine tools, industrial control instruments. two color indicators share positive.After selecting the common anode, the black line is the positive electrode of the common anode, the is the red light (negative), and the green line is the green light (negative). Red and yellow, red and blue are the same. This LED indicator has high- CNC machine cutting technology, and the metal shell has high structural strength, which is more environmentally friendly and to falls and collisions.