Coghlan'sEmergency Survival Horn - 115dB Loud Signal Device for Outdoor Safety, Hiking, Camping & Rescue - Compact, Lightweight & Reusable for All Adventures

I have the Coghlans air horn attached to my key ring. If I ever need have to use it, the air horn will be heard from a long distance. I like how it can detach & detach from its cord

I bought mine half a year ago, but because of the warning, never tried it. When I tried to use it today, no sound at all. I opened it up and the diaphragm is torn, so came defective, but I missed the return window..Edit: I managed to find a balloon that I was able to replace the torn diaphragm and it at least make a sound, though it is not as load as other customers describe. If this is a regular issue, then it should come with an extra diaphragm.

This thing is loud. Don't test-blow it indoors or you might annoy the neighbors if you live in a multi-family dwelling!While I've heard louder portable disposable canister air-horns this one is as loud as many of them. When you factor in the limited number of blows from a canister this re-usable one is still going to be MUCH louder than any of them once they run out of charge and go dead. If you have ever found yourself out in the fog and surrounded by other boat traffic and had that bad feeling as your air canister went flat you will appreciate what a safety feature NEVER running out of air can be.For the extremely low price and small lightweight construction this is a piece of backup safety equipment you really can't afford to pass up. While it is not a perfect piece of gear for the price how could anyone complain?Minor issues that for this price are not that big of a deal:*You need to hold this with one hand while blowing into the hole. It can't be used like a whistle while just holding it in your mouth. A mouthpiece at the side hole would be nice although I suppose it would make the unit a little bit larger and then not fit into a stash bag. If you are trying to bail whle hanging on in rough seas that might be an issue.*It's not fully water-proof. While I don't think water would hurt it at all once it dried out it might not make much noise if it is wet or full of water inside where a safety whistle is self-clearing and some of them can even be blown underwater. That might make this less useful tied onto your PFD in a COB event. An emergency whistle would be a better choice here. In a storm with enough rain or spray this might not be the best choice if enough water gets in to muffle the vibrating membrane. A good survival whistle could easily be strung on the same line as this to keep them both together in your emergency kit and give you a choice. This is NOT a kayaking whistle as another reviewer pointed out.*Yet another reviewer said that his horn stopped working after a few years when the membrane came unglued inside. Any and all safety equipment should be inspected annually at the very least and a problem like should be rectified immediatly. This is boating, you know "a hole in the water you dump money into" and stuff doesn't last forever on any boat. Safety gear needs to be checked and re-checked to ensure it is all in proper working condition and this little guy is no exception. If in doubt, buy two of these -they are CHEAP. replacing a $3 item when it goes bad shouldn't bankrupt anyone. If it does, perhaps boating isn't the correct activity for you ;)*Finally, it says right on the packaging to "Blow into the SIDE of the horn." I have seen so many people complain about how this, and other similar breath-powered membrane horns here on Amazon wouldn't work, where they were trying to blow into the end the whole time. That just won't work!

Good for the price. Bought 2 years ago. Now after that time the rubber piece inside has "died." Opened up the top and replaced the rubber with a small rubber party balloon with part of the section you'd use to tie up the balloon cut off. Worked great! The horn is as loud as before. Would recommend.

Just so no one makes the mistake I made.This is NOT an aerosol spray can. You have to blow into it.This thing is constructed like a whistle. It has the same basic construction as an automotive oil-filter but with a rubber membrane at the bottom. When you blow in the little hole the membrane vibrates and makes quite a loud noise.This thing is suprisingly lound for its size and the fact that it is "puff powered", however, it is no where near as loud as the hand-held aerosol can type. But it should suffice as an Emergcy horn or for use at sporting events and such. I need it for maritime use and this did not quite cut the muster for that.I'm giving it 4 stars because for the simple device it is, it is well made and performs.-n

ultralight air horn. this was my #1 self defense tool while backpacking a new york state park and the AT for a week, which happens to serve as a black bear refuge. i kept it around my neck tucked into my shirt at all times.to note:i haven’t blown fully- but you need to make a plan to tuck one ear into your shoulder while covering your other ear. this thing is dangerously loud and due to it’s size, unavoidably close to your ear holes. i made a tiny test honk, and my i-devices alerted me of decibel levels.highly recommend over a bell or whistle to any hiker concerned about black bears, wildlife, and emergency rescue. this compact, affordable, super lightweight horn should be in every front and backcountry camper’s kit.