For such a small object, the sound is loud

Great little sound alarms for the price.

Neither will appreciate the ear-splitting sound of these going off for hours on end.

It's very reasonably priced and the sound of each alarm is so unbearably loud and high pitched that I'm confident that it would scare away any intruder

The sound is loud enough to get your attention unless you are a long ways away

Oh my goodness do these little things give off a mighty sound!

This one seems to have stronger sound and the glue also seems stronger which was the main problem in the first product we bought.

Excellent alarm in regards to sound and easily mounted however keep in mind that the area your mounting to must be flush to make the connection so not recommended for all doors.

They make a piercingly, painfully loud sound for the alarm, and a very startlingly loud sound for the chime if you get the ones that have the chime.

They make a piercingly, painfully loud sound for the alarm, and a very startlingly loud sound for the chime if you get the ones that have the chime.

Great little sound alarms for the price.

they definitely do the job very loud sound if someone opens the door.

What wasn't described is that it has the most earsplitting, annoying alarm sound that my members would rather be robbed than listen to it every time someone comes in

Makes a great alarm sound!