The Hamster Automatic Feeder is a simple and convenient way to feed your pet. This feeder automatically dispenses meals every hour, and it has a large capacity (400ml/300ml) to accommodate any mealtime needs. The back screws hole allows you to firmly attach the food dish bowl to the pet cage, and the non-trace screws allow you to firmly attach a glass cage or terrarium. The feeder is easy to refill and clean, and it comes with all the necessary equipment for installation.