For Boo-chan only. WET STOP3+ Bedwetting Alarm

This is a device used for enuresis alarm therapy. My child used this and improved in about a month.
We continued to use it for several months after improvement. Now that it is no longer needed, I am selling it.
For shipping, I will not include the original box. I will send only the device itself (with batteries still inside, so it can be used immediately) and the instruction manual. The gorilla mark on the surface has faded, so I have classified the item's condition as slightly scratched and dirty. Please check the images. It has been tested with tap water, but as it is a used item, I would like it to be purchased by someone who understands this.
Thank you for looking.

Nocturnal enuresis
Alarm therapy
Gorilla
Bedwetting alarm