Ultrasonic anti-bark device

Water drop design anti-barking device with adjustable ultrasonic frequency for easy use.

Purchased new. I have multiple medium-sized dogs (mixed breeds) and it worked for the ones that barked. However, the dogs that don't bark became scared of it, so I stopped using it. I hope someone who is struggling with excessive barking can use it.

The bite marks on the box are from when I lent it to a friend. They said it was also effective for their dog.

Please consider this if you don't mind minor details.

Batteries are included, so you can use it right away.