Spotty Potty Trainer Bells and Bags Royal Pet Inc. presents the ingenious Trainer Bells and Bags set from their handy-dandy "Spotty" collection The tool helps humans teach dogs to ring the bells and communicate whenever they need to go out Set includes 20 pet waste-bags in a detachable dispenser for convenient access to easy poop pick-up Adjustable strap fits easily on any door handle plus there's a handy-dandy Training Guide included Recognizing the critical role pets play in people's families, all Royal Pet products are produced with the simple principle of delivering maximum-grade quality