Air Horn, 1.4 Oz.

Well, this is loud! I bought the smallest one on Amazon, since it's just for emergencies or rarely to get people's attention. (I don't have a boat, or I'd probably have bought a much bigger one.). I bought one as a desert tour guide for stragglers. I warned them "one blast, stop dawdling and walk toward the bus; two blasts, we're about to leave, so maybe you should pick up the pace; three blasts, call an Uber if you can get a signal. We're leaving without you." I never had to use the horn, but just telling them about it made a difference. Especially the part about "call an Uber *if* you can get a signal," something people take for granted in the cities and suburbs, but when you're in the desert mountains, signals are few and far between. The other one I bought a few years earlier for a tenant who had a young, rambunctious upstairs neighbor who practiced nightly noisy interactions of just the type you are imagining. Banging on the ceiling with a broom stick didn't work. Talking to her didn't work (the tenant talking). I finally wrote a letter saying "You know, Mary can hear *everything* you do in your bedroom. Everything." The tenant didn't care, so I bought Mary an airhorn to use to scare the bejeezus out of the rambunctious upstairs tenant. She used it only once, and the tenant upstairs got quieter after that. Long stories, just to show that these things are loud, compact, convenient, and inexpensive. I've never used one long enough to see how long the charge lasts, but for my purposes they were great.

Was tinier than I envisioned, so wasn't expecting it to be as loud as I needed. Tested it out real quick on the deck with a short burst and nearly blew my eardrums out.

Well the size was smaller than expected but the product worked out.

This product provided the functionality that was claimed. However it is a dangerous device that has not been properly labeled. The United States Centers for Disease Control indicate that ‘noise above 120 dB can cause immediate harm to your ears’. This horn delivers 120 decibels. A quarter second button press and my ears were instantly in pain and ringing. Not indicating the danger clearly on the product would be as irresponsible as not labeling a hazardous chemical. Make sure children do not have access to this horn, and ensure that you protect your ears before use. Also, note that the sound of the horn is very high frequency, similar to the high piercing sound a balloon makes when air is released through a flattened valve (so, not like a low fog horn).

Bonne qualité et bonne puissance de bruit