Features Ideal for dog toilet training, house training and entry way to allow communication between you and your pet. Can be used not only as a dog doorbell, but also as a service bell/doorbell in shops, restaurants, pubs and hotels. The delightful bell sounds clearly and without noise and can be heard from a distance. The bell is attached to a sturdy elastic band that is smooth and slotless, which can hurt your pet when you need to ring the bell. Product Name: Dog Training Doorbell Product Material: Iron Product Size: 18cm*8cm Colour: black Packing list (you can get it after buying one product): Doorbell x1 Please understand: 1.Due to the long shipping time, the item may be damaged during shipping. If the item is damaged, please leave us a message through the official website immediately and then post a comment, I will solve the problem for you. 2. Due to manual measurement, the size may have 1-3cm error. 3. Colour may vary by monitor.