The watermelon is a dud... I bought them for repelling mice, at first it seemed to work, even though it made an annoying sound that I could hear too, but over time it got weaker and sounded like it was broken. Not to mention that even though we still have them installed, they don't make any sound anymore even though they're in the sun all day. Additionally, some have fallen apart because I had bought 2-3.

It broke within 2 months and is not covered by warranty. While it was working, it made an annoying and disturbing noise. Waste of money.

Or I am a rodent and the noise it makes bothers me, it is really annoying. Like horns in traffic. I took it out because it was squeaking all night. I will never know if it works. Tragic!!! I threw away the packaging and I can't return it!!

I bought 2 and tried them in different occasions. Nothing. The only thing, an annoying (for humans) buzz!

At first, it needs to gather energy from the sun to charge the battery. It makes a slightly annoying sound, but in practice, it remains to be seen if it does the job..

It seems to get the job done, but it makes too much noise.
For now, I have disconnected it because I believe it bothers the neighbors!

We filled with lizards.
I put two in an outdoor space like a yard and the lizards became a flock.
Maybe it's to attract them?
Wasted money. It would be better if I threw flowers in the trash.

It did the job. It chased away the blind mouse. It also withstood the rain. Just after a few days, it started to not make the sound it used to. I unplugged and plugged in the cable again, and it has been working very well until today.