Oh my WORD! This is SO loud! It's perfect to call attention to an unwanted situation or to call attention to anything where you may need assistance. I got me one and one for each of my kids. The pin releases easily BUT it doesn't seem to just fall out either so you can carry with ease and won't have to worry about setting it off. But if you do, it's easy to slip it right back in. However, it's so loud I wouldn't recommend taking the pin all the way out to test it. Your nerves will get the better of you and you'll fumble trying to reinsert it! Haha! A little pull will give you a real good idea what it's capable of, I promise.