Description: Long-life and reliable LED Indicator with Flashing Light and Buzzer. LED for energy saving and low maintenance cost. Hight brightness and loud buzzer for easy recognition. Screw-clamp for easy connection and strong conductivity. IP40 inflaming retarding shell. From electricity equipments to textile machines, printers, ships, mining machines and everything in-between, these panel mount pilot lights are sure to give you a visual status cue of any indication signal, warning signal or accident signal. Simply drill an 22mm (7/8 Inch) hole, and use the included screw ring to secure this Buzzer Light to AC/DC 24 volt power source.