Package include :
2* 16MM Buzzer
6 * terminals
4 * Heat shrinkable tube

What's Buzzer
Buzzer is an electronic buzzer with integrated structure, which is powered by DC voltage.

Long-life and reliable LED Indicator with Always light,Continuous Sound.
LED for energy saving and low maintenance cost. Hight brightness and loud buzzer for easy recognition.
Terminals and insulated heat shrinkable tubes, 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 16mm (0.63" ) hole, and use the included terminals to secure this Buzzer Light to any 24 volt power source.