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-precision CNC machine cutting technology, and the metal shell has high structural strength, which is more environmentally friendly and to falls and collisions. Voltage: 12-24V; Function: common anode electrode; Working temperature: -40 - 70 / -40 - 158; Working humidity: 10%-90%; Shade type: flat ; Protection level: IP67, IK10; Colour:As Shown Material:Metal Package Contents: 4pcs x small led light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.