I saw one of these in a Skymall magazine years ago. I think it was called Bark Buster but more or less the same thing. I couldn't stop laughing but was trying not to laugh out loud. I think the people sitting next to me probably thought I was concocting an evil plan, like Muttley from Wacky Races.
THIS IS THE VOICE OF PET COMMAND ALL DOGS MUST OBEY PET COMMAND OBEY PET COMMAND OBEY PET COMMAND
OBEY
OBEY
OBEY
OBEY
OBEY
OBEY
OBEY
OBEY
OBEY
OBEY
OBEY
OBEY
How does it even work? I get the horrible noise as a negative reinforcement for barking, but how is using it supposed to make it do stuff you would positively reward (like bringing beer).