1、This LED indicator light is uniform and has a life span of more than 10,000 hours. 2、Accurate CNC machine tool cutting technology, one-piece metal shell has high structural strength, and it is more environmentally friendly and resistant to falling and collision. 3、These LED signal lights have a built‑in waterproof sealing loop, which is waterproof and dustproof. 4、Flame-retardant base, high temperature resistance, flame-retardant in emergency situations, fire-retardant wire, enhanced conductivity. 5、Common anode (anode black line) means: 2 color indicator share a positive. Item Type: Indicator LED Light Material: Brass chrome plated Uses: Computer modification, access control switches, CNC machine tools, industrial control instruments Installation Size: M12 x 0.75Applicable Voltage: 110-220V Function: Common anode Light Source Type: LED Working Temperature: -40℃~70℃/-40℉~158℉ Working Humidity: 10%-90% Shade Type: Flat head Protection Level: IP67, IK10Features: Common Anode Electrode Means: 2 color indicators share a positive electrodeAfter selecting the common anode, the black line is the anode of the common anode, the red line is the red light (negative), and the green line is the green light (negative). Red, yellow, and red and blue are the same. Size: Approx. 12mm / 0.5in 4 x LED Indicator 4 x Compression Nut 4 x Washer