Features High Brightness: Works as the light source, the LED enables stable bright lighting on vibrating machine and equipment. Three Color LED: Red, yellow and green 3 colour flashing lamp ensures better alarming effects in the dark environment. Broader Utility: Can be widely applied to industrial assembly lines, workshop machine tools and so on, very practical. Better Material: High in strength and toughness, the flame retardant ABS shell is durable with corrosion and long use. Foldable Design: Allows for flexible 180 degree folding, the lightweight stack light 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: No Lighting Method: Flashing Package List: 1 x Signal Tower Note: Pay attention to electricity safety when using. Package List 1 x Signal Tower