Acoustic alarm Schrill

This device requires caution – used as a joke, it could damage someone’s hearing. It emits a sharp, very loud and piercing sound at a high frequency. It’s a pity the gas runs out quickly, but I found a way to refill it with lighter gas.

Light, compact deterrent at an affordable price. A small gadget that's particularly worth having, especially for women. I bought it for my wife and I hope she'll never have to use it. It's an expense for safety.

Handy, small and very loud acoustic deterrent. It works well for walks in the forest, as well as in the city for protection against attackers. Product fully in line with the description, I recommend it.

It is very small and handy, produces a really loud sound. Thanks to being powered by compressed air, it is reliable in all conditions and can be stored almost anywhere. In my opinion, it's better than electronic alarms.

Small and light, with a long three-year shelf life. I take it into mountain regions as an addition to bear spray. It takes up a minimal amount of space, and the noise it makes is really considerable.

A great means of protection against the use of gas. It proved effective during trekking in Romania, quickly chasing away herding dogs that were pursuing us. In dense undergrowth, it can be used to alert bears to your presence.

Extremely loud, you can't stand it when it's activated. Cool gadget for scaring animals in the forest, and it can also be effective for self-defence. The downside is high gas consumption, and sometimes the canister detaches from the whistle in your pocket.

I tested it in the forest – the sound is very loud, a mix of a whistle and a screech. This signal effectively scared off a big dog that was barking and approaching. So it can turn out to be very useful.

The siren is very effective and loud, it easily scares off threats and alerts people nearby, who can quickly react and provide help.

Very loud signal or deterrent; the sound is almost unpleasant for the ears, it could even wake the dead. Tested in the forest – I don't recommend using it at home. It's worth getting a spare cartridge.

A really loud deterrent, and also easy to use. I've already found it useful while cycling.

Be careful during testing, as it is incredibly loud. Alarm purchased at the new MILITARIA.pl shop in Bydgoszcz on Dworcowa street. Very good service, I recommend it.

Exceptionally loud and effective, I recommend it.

Product bought as a present, everything is fine.

The alarm is very loud.