Features: 1.BATTERY POWERED: Automatic fish tank feeder is powered by 2 AA batteries (not included) and can last for 2 4 months. Perfect for aquarium lovers on vacation travel or busy work. 2.TIMING FUNCTION: The feeding amount of fish food dispenser can be adjusted and controlled according to the actual demand, and it is automatically and accurately fed every 8, 16 and 24 hours. 3.APPLICABLE TIME: Whether you are at home or on the go, this automatic fish feeder is perfect for daily use. Even if you're traveling, you don't have to worry about feeding the fish. 4.FRESH AND DRY: Fish tank food dispenser keeps food fresh and dry without getting wet or stuck. Suitable for all kinds of fish food such as flakes, granules, powders and bars. 5.SMALL AND PORTABLE: Aquarium food dispenser is small and light, it will not occupy too much space in the tank when used, and will not hinder the work of the fish tank during normal feeding. Specification: Item Type: Automatic Fish Feeder Material: ABS Battery Type: 2 x Dry Cell Battery Model: 2 x AA Batteries (Shipped Without Batteries) PackageList: 1 xAutomatic Fish Feeder Note 1. Note that you can not use the old battery 2. Battery installation positive and negative pole correspondence