Feature:1. [Timing function] The fish food dispenser is divided into two stages for feeding, and the feeding amount can be adjusted and controlled according to the actual demand, and it is automatically and accurately fed every 8, 12, 24, and 48 hours.2. [Capacity Optional] The automatic fish feeder is available in 210ml/100g/3.5oz large capacity feed tanks and 80ml/50g/1.8oz small capacity feed tanks to meet various needs.3. [Battery Powered] The automatic fish tank feeder is powered by 2 AA batteries (not included) and can last for 24 months. Perfect for aquarium lovers on vacation travel or busy work.4. [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.5. [Fresh and Dry] The fish tank feeder keeps food fresh and dry without getting wet or stuck. Suitable for all kinds of fish food such as flakes, granules, powders and bars.Specification:Item Type: Fish Tank Automatic FeederMaterial: ABS PlasticParameter:Battery Type: Dry Cell Battery Type: 2 x AA (Not Included).Package List:1 x Automatic Feeder1 x Base1 x Bracket1 x Plastic Screw1 x Feed TankNote:1. Please remove the battery cover, put in two AA batteries and snap back the battery cover. Then install the corresponding base or bracket according to the installation method that needs to be fixed.2. Before each feeding, please control the size of the opening with the feeding volume adjustment switch to control the feeding volume each time.3. During the rotation of the barrel, repeatedly pressing the Manual button is invalid