Doorbell Now this amazing newly modified and improved version of the Pet Doorbell comes with an extended full two year warranty. Your satisfaction or your money back We are so confident in our new improved version of the Pet Doorbell we have extended the warranty. Our half price sale is extended through the summer. This is the most reliable, durable Pet training device on the market , altering Pet owners of their Pet,s need to go out and come in. Works for cats and dogs Fun for Family and Friends. Your Pets very own Doorbell Pet Door Bell Training Device