DescriptionThis is a set of 2 pieces Dog Potty Training Doorbells. Tinkle dog doorbell will be the best device for the communication between your pets and you. The pleasant chime sound is loud as well as clearly without noisy sound. This practical gadget can bring a lot of convenience to your life.Feature- Color: Black and White.- Material: Manganese steel.- Size: About 18x8x4cm.- Use our dog doorbells, you can train your dog easily and communicate effectively.- Great for pet dog potty training, housetraining and houserbreaking.- Better way for the communication between your pets and you.- Not only can be a pet dog doorbell, but also can be a service bell/doorbell for stores, restaurants, bar and hotel.- Help your dog develop good habits, make your dog more disciplined and smarter, brings convenience to your life.- Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you