There are 3 small dogs that bark nonstop for up to 12-16 hours a day, every day, frequently from 8:00 am to 8:00 pm or to midnight, for years now. Initially, I assumed I would need to get close to them to use the PetGentle device for effectiveness since they are three backyards away from my 3rd-floor apartment. Getting access to them was not really practical given the layout of the yards and high fences.
Surprisingly, I discovered that this device works from this distance nearly instantly, they obviously hear it. (I had also purchased a white noise machine to drown out the racket.) It is obvious the owners do not care about the behavior of their dogs or the feelings of their neighbors as many complaints with the City of Oakland have accrued over the years; this easy fix is truly, truly a blessing!
I also have one large dog (Marmaduke size) next door that barks deeply and continuously whenever his people leave. Our apartments are separated by about 25 feet. When using this device, it quiets the dog within seconds and stays quiet.
It doesn't get any better than this. And the best part is the owners have no idea that their intransigence, disrespect, and disregard is being transcended big time! This is an amazing product.
Thank you, thank you, thank you!
Bottom Line: Yes, I would recommend this to a friend