Boom Plate Electronic Firecracker Noise Maker. 

Boom Plate w/WIRELESS REMOTE CONTROL Electronic Firecracker Noise Maker. LOUD! SCARY! REUSABLE!

NOTE: New style is bright red with chinese symbols on it. You can spraypaint it like the one in the photo, or use it as-is.

If you prefer a push-button, please use this: https://www.halloweenfxprops.com/boom-plate-w-push-button-electronic-firecracker-noise-maker-loud-scary-reusable/?searchid=246080&search_query=boom+plate

BOOM PLATES

These flat circular discs plug in to normal 110 volt power. When triggered, they emit a loud 90 db BANG like a machine gun!

Louder than the electronic firecrackers, as these have multiple crackers contained inside.

Great for using in props where you want to startle someone, but don't have a lot of room to hide the device.

Boom Plate Electronic Noise Maker. LOUD! SCARY! REUSABLE!

Also great to use on the floor. Plate also emits a green flash when activated that adds to the startle scare.

Comes with switch/button to activate.

Also works well with a Houdini and PIR Motion Sensor if you want it to activate automatically when guest walks by through the infrared beam.

NOTE: This prop will get hot if left on too long. We recommend shooting it off for less than 8 seconds, and then allowing at least 15 seconds for it to cool down. If left on too long, it can melt and stop working.