Review on BECETTY Upgraded Bark Control Device: Stop Barking with Sonic Outdoor Bark Controller - Training for All Dog Breeds by Kristen Cunningham

When I open this I turn on the charger and it immediately makes a horrible buzz that shakes my ears. I tried putting it in another room, it was still audible. My dog has become very quiet and shy. After the hassle of charging, I tried using it for my dog. He didn't do anything, I could see the light flickering, so he picked up the sound waves, but the dog acted like he didn't notice at all. All settings through and nothing. This is junk I spent money on. And I'm disappointed. I give 1 star because it's cute and sad to look at, that's all I can say