Works for all Dogs: Our dog doorbell has a large and sensitive touch area that is easy for dogs of any size whether you have a small puppy or a large one Additionally it is cE Fcc and RoHS approved Premium Transmitter: The transmitter is designed with a lithium battery that can last up to 2 years It is also rated IP65 for dustproof and waterproof protection allowing it to withstand harsh weather conditions between -4 AF and 140 AF Music to Your Ears: This dog training bell features a stereo speaker that delivers rich and crisp sound with 20 different melodies and 4+1 volume levels ranging from 0db to 100db It also has a memory function that remembers your last melody and volume level in case of a power outage 1000 Ft 300 M Wireless Range: This dog potty bell has a reliable signal transmission and will not interfere with other equipment in your home or those of your neighbors ensuring you will never miss any signal from your dog Easy to Setup: Simply plug the receiver into the socket and attach the button on the wall with double-sided tape or screws which is very firm and chew-resistant this dog bell comes with a 90-day free return and a 365-day exchange service