Specification: Features: 1. Dog Doorbell: An Easier, Better Way for your dog to communicate Instead of hearing barking scratching, you hear the gentle jingle of bells 2. 2 Level Adjustable Length: This upgraded design provides you 2 level of length adjustments compared to common two length bells. This allows for easy adjustment of the length to the bottom of the door or wall based on the size of your dog or the height of your door. 3. Easy Installation: Easily mounted, and can be hung at any level to accommodate pups of all heights. 4. Durable Safe Material: Made of high-quality nylon strap and extra loud tinkle bell, this premium dog ring bell is durable, sturdy, bite-resistant, and no harm. So even if the dog keeps biting the rope, it will not cause damage to their teeth. A must-have for daily training and playing. 5. If you don39;t want to install a dog door on your own door, then choose this puppy bell, it39;s very convenient and easy to use, and it39;s fun to interact with your puppy. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material: cloth alloy Strip size: 2.5*85cm Bell size: 3.5cm Battery: No Decoration form: hanging Color/Style: As the picture shown Package List: 1 x Dog Doorbellset