Review on Dive into Silence: Dogtek Sonic Bird House Bark Control Outdoor/Indoor - Enhanced Version by Robert Howell

Initial review 01/18/20: I have to lock up my dogs when we have guests because they keep barking and just freaking out General. I kept this bird house in their kennel while we had some plumbers and they were quiet the entire time the plumbers were here - for the first time. The volume was set to medium, but perhaps could have been turned down. They found very quickly that their barking was making an awkward noise, and they only barked a few times before stopping altogether. constant barking. To conserve battery power, I turn on the birdhouse 5-10 minutes before we wait for someone and leave it on until the guests leave. I don't leave it on all the time because it picks up other loud noises and startles my dogs. I cleared my throat near their kennel when the device was on and my dogs were scared and confused. That's why I give 4 stars. Otherwise a great purchase. UPDATE 4/7/2020: After using this product for several months I have decided to stop using it. My dogs are now worried and scared when we have guests. Now they have connected that there is loud noise when guests arrive which is unfortunate. One of my dogs is now generally very sensitive to loud noises and is startled by thunderstorms. BE CAREFUL when using this product as you risk creating more problems than you originally had. :(