Feature: 1. Interaction: The best tool for interaction with pets. With these writable dog buttons, you can let your dog interact and even express ideas through buttons. This is very interesting. 2. Recording: the recording button can record up to 30 seconds. If you want to teach your dog to communicate with you, you can record simple words, such as B. "Go to play", "eat meat", "eat snacks", "dad", "mother" or other words you want to express. 3. Learning: If you want to learn certain training methods, you can buy related books as a reference or learn training methods through videos shared by other people on the Internet. Learning and repetitive training will give you more fun between you and your dog. More interesting is that dogs can also interact with each other via the recording button. 4. Durable: These dog communication buttons are made of durable plastic, safe and reliable. 5. Easy to use: each button requires 2 AAA batteries (not included). The base diameter 10 cm. Turn on the switch, then long press (and hold) to record, talk, then release to stop recording. Specification: Battery powered: 2* AAA batteries (not included)Color: blue+pink+yellow+purple Package List: 4 * Dog Buttons Note: Due to the lighting effects and shooting angles, there is color difference in the product, please understand.Due to manual measurement, there is a tolerance in the product size.