Feature: 1. Bright Lighting: Using high brightness LEDs as the light source, the signal tower ensures good stability on vibrating machine. 2. Three Color LED: Comes with 3 colour flashing lamp of red, yellow and green enables better warning in the dark, very reliable. 3. Practical Using: Allows for wide application in industrial assembly lines, workshop machine tools, night traffic warning, etc. 4. Strong Material: The ABS shell with high strength and toughness is flame retardant, very durable with corrosion and long uses. 5. Foldable Design: Enables 180 degree folding, the stack light with light weight and small size can be mounted flat or side mounted. Specification: Item Type: Signal Tower Material: ABS Tube Outer Diameter: 60mm / 2.36in Overall Length: 28mm / 1.1in Lamp Colour: 3 colours, red, yellow, green. Voltage: 12-24V DC, universal. Buzzer: Yes Lighting Method: Flashing. Package List: 1 x Signal Tower Note: Pay attention to electricity safety when using.