It has a loud whistle
935000
I wanted a kettle with a good whistle, and this has one for sure.. Downside is that it is a bit hard to pour when hot.  Nice basic everyday kettle for a regular tea drinker like me.
4082949
The tea kettle looks and feels far more expensive than it is.  The whistle is so loud that I hope this will be the last tea kettle I have to order.
664438
Great whistle. Not a fan of dog whistles, think people use them incorrectly and hurt the hearing of animals but this one is great. I can also hear it. My dog gets SO involved in whatever she's sniffing or is upwind of me and doesn't hear me call. This whistle gets her attention, even on the windiest of days. And the cat comes too...great bonus!!
4880662
I don't know about this whistle. Its not very loud at all for $10, I feel it should/could be a little  louder maybe I'm not blowing hard enough or correctly??  When cycling, now i blow it harder. Persons jump when I have to go on sidewalk.  lol now I will test it in the streets when riding thats  the real test.
2357779
I bought this whistle for our hiking in a few weeks. It is very important to have one just in case I got lost in the woods. Although this whistle is tiny, the sound it produces isnt. The whistle is loud enough. I believe I bought a good one. My husband is currently using it in his work since it requires him to go through deep vegetations and theres a risk he might get lost especially when signal is weak. Whistles are also important for kids when they are in distress. I recommend this to hikers and parents for their kids to have anywhere they go.
2571563
Monotone whistle, so even though it may technically be 120 dB, it creates a single pitch sound that is not easily distinguished from other noises.  In a noisy emergency, like a storm, or in a situation where there was a lot of vehicle or equipment noise, I doubt seriously that it could be heard..

But as a key-chain whistle it is excellent.  It is made of good quality metal, super compact design, adds almost no weight to your key chain, and the workmanship is excellent.

Plan to buy more as gifts.
3358433
This is not a real dog whistle. Its a regular one. It's completely not worth ur time unless u do want a regular one.
4234350
Light weight, plastic, loudest whistle I have ever used.  This makes the loudest high pitch sound! You need ear protection with constant use.  It is LOUD.  It works underwater.  Great for diving to get your dive partners attention.  It is a little larger than a traditional whistle.
1143289
Works as advertised. I like that it has three different and distinct sounds. I use it at volleyball games that I referee. Sometimes, other whistles nearby interfere with the flow of play as the players in my game think that they heard a whistle. But with the different sound, there is less of a problem.
3790507
At speeds 4 and 5 the thing whistles, which gets pretty annoying.  Other than its pretty good.
2526327
Over the top boys!!!! After seeing these at a shop, I imagined the throngs of british soldiers advancing out of their trenches to the sound of section leaders blowing on these whistles as they charged through mud and barbed wire (Ok - I had also just seen War Horse the movie as well...)  Has a very distinctive sound that screams Great Britain.  The whistle is well built and a quality product that is nicely finished.  I bought one for my wife's key chain, but couldn't bring myself to part with it so I kept it for myself.  I guess I need to order another.
2665581
I imagine if you are a lifeguard, this whistle is fine.  It is glow in the dark too.  For my purposes as an indoor ref,  it is too large and bulky.  It is loud though!  Whistle has a rubber mouthguard which isn't too clear in the picture.
1383869
Loud.  You need to blow hard though.  Blowing softly doesn't produce much of a whistle.
711919
This whistle may save your life. It is one of the 2 loudest whistles I have found. This one is better than the other because it requires very little breath to get a good amount of volume... very handy if you are injured and all you can manage is to place it in your lips!
783348
The whistle is not the greatest.  I was excited seeing this but a bit disappointed in the quality.
3609158
This isn't a silent dog whistle.  It's a whistle.  You can adjust the pitch by turning the bottom part.  It's dirt cheap, so I'm not all that upset.  I'm just letting you know it's not a silent whistle.  It is LOUD though, so if that's what you're looking for, go right ahead!
2906663
It is very loud. I bought it for my Grandson, who has a difficult time waking up in the morning, as do many persons.