"I bougth this product because I live in an apartment building and my 1 1/2 year old lab started barking when anyone opened or closed the front door, walked up or down the stairs or came anywhere near the door to the apartment. I already have a bark collar, but I don't feel comfortable leaving it on him when I'm not home incase it malfunctions. I use the collar in the car for extended rides, but for house use it's not as effective. I bought this to help when I wasn't home to cut down on his barking, so far it's been 3 days. The first day he would bark a few times, then stop...bark a few times then stop, each time barking less. Now that I'm home from work he barks maybe once when someone opens the door and then he stops. The buzz only goes off for extended barking fits so it doesn't completely stop him from barking, which I like! I don't want him to forever stop barking.
CONS: No on/off switch. Also, fairly expensive for what it does, BUT it solved my apartment/neighbor issue so I am happy with the purchase."