This Signal Tower Light is a great choice for industrial automation. It is 3 level with 3 colors (Red, Yellow, Green and Buzzer) and has a diameter of 60mm. It features PNP-NPN wiring output, a buzzer function and a red are flash lights, a 1.2m cable with 5 wires for electric connection, a black lampbody and a power supply of 24V DC. It is made up of ABS for the body, PC for the lens and base.