Specification: Color: 1 Red, 1 Blue Product Size: 7·2CM x 5CM / 2.84 x 2 inch Material: Plastic Product Weight: 156g How to entertain your pet using the pet button bell? Check out these steps for interacting with your pet. (1)Using treats, motion for pet to hit bell.You can take up pet paw and put it on the bell. (2)When pet ring it,then give verbal or physical praise before rewarding wih a treat.This will help it learn to work for praise rather than food. (3)Continue practicing,repeat for three days,as long as it press button,it will get praise and food.Note:If you want to toilet train pet,change the step 2.Putting bell by your door,whenever take pet out,teach it to ring the bell like step 1.Repeat to let it know your mean. Function of this doorbell: Potty training Housetraining Housebreaking Interacting with your pet Features of this doorbell: 1. Sound: Pleasant sound and loud enough 2. Portable: For small size and lightweight, this bells is handy and easy to carry during travel, walking, road and any other outdoor activities. 3. Waterproof: It can be left outside. High-quality Material The potty training bell body is made of metal material with cute printed pawprints. Painted finish and prevent rust. Nice Ringing Nice sounding is loud and clear but not driving you nuts. Easy on your ears to delightly attend to your pet's nature call wherever you are in the house. Package Includes: 2 x Dog doorbell