Review on Weird Tails Dog Bell for Door Potty Training - Wireless Dog Bell IP65 Waterproof Doorbell Chime - Operating up to 950 Feet - 20 Melodies - 5 Volume Levels - LED Flash - 1 Receiver & 2 Transmitters by Spliff Sinha

I was a little skeptical about this potty training doorbell for our 7 month old pup but I'm so glad I tried it. I had no doubts that the product would work but that the pup would not use it. Boy was I wrong. The product comes with 3 pieces; 1 receiver that plugs into the wall (where the ringtone comes from) and 2 transmitters. The transmitters are mounted on the inner door or wall and on the outer door. They can either be hung or screwed to the wall. We used glue. There are 20 different sounds to choose from, and the volume is adjustable. It worked surprisingly well and my pup figured it out very quickly. Although he doesn't use it consistently. If you have any doubts about this product, stop right now and give it a try. You will not be disappointed.