Outdoors it is not strong enough to be heard, you have to put it very close to the child.
Also, by default it stops after half an hour and you have to start it again, many times the little one hasn't managed to fall asleep yet and the stop-start disturbs him.
The equivalent product from mama said is much better in these areas

Very good white noise device. You can tell when the batteries are running out as it no longer lasts 20 minutes and the sound volume decreases. Personally, with use only at night, in 5 months I needed to change the batteries 2 times.

The only problem we had was with the crying detector. Even though we had it very close to the child, it didn't always recognize it to start. It's okay for songs. Not too many, not too few.

The only disadvantage I find is that it automatically shuts off after 20 minutes (just when the child falls asleep, the device stops and wakes up). We changed the batteries every 2 months with daily use

Absolutely satisfied, we also added rechargeable batteries for more economy. From the first days of the baby, we used it and now that he is 3 months old, he realizes that when the sound is heard, it's time for sleep... In general, it is worth buying the mechanism and not the whole doll, which will get dirty, collect dust, and later put it in his mouth! Its sensitivity is very good, with the "click" it starts working! I recommend it to everyone!!

It would be good to have it from the first day of the child at home. As a newborn, the white noises helped a lot to calm down. Also, the shhh helped with relaxation and sleep. In the 4th month, we no longer use it often, but we sometimes play lullabies for relaxation. The sound of the sea is very nice too (I will probably keep it for my own relaxation..)

Unfortunately, it deactivates on its own after a few minutes. We preferred a sound machine that remains active continuously

In terms of features, it does exactly what it says. The cry sensor works correctly, it has nice sounds, it's easy to use, and it has a nice strap to carry it everywhere. Whether the baby will stop crying is purely a baby matter, don't expect to be saved by this. Our baby, when he has intense crying from pain or whining, this speaker does nothing for him, while the mobile phone, which is louder, calms him down immediately.
The main disadvantage: it takes batteries.... We need new ones every 3-5 days. It could have cost 5-6 euros more to have a built-in battery and charge with USB. I bought rechargeable batteries and a charger and somehow solved this problem.

Really excellent!!! Our baby is 6 months old and thankfully we have been enjoying it for days!! It's a shame I didn't have it for my first child!!! We don't go anywhere without it!!!

It helped a lot to calm my baby! Useful on walks inside the car and even in his crib! The sound it makes, shhh... is very helpful!

I had bought it for my first child along with the doll, which was not useful at all. We used it until he was 1.5 years old because it helped with sleep. It broke because my son hit it against the wall, otherwise it wouldn't have had any issues. Now, for my second child, I only bought the device and I have it set to white noise. It's very convenient that it starts on its own every time the child cries. It has been a lifesaver for me! It truly deserves its money!