You can push the button of the fish feeder to feed every 12 hours or 24 hours automatically. And it also allows you to feed any time manually according to your need. This fish tank feeder can keep fish food dry and does not become wet or blocked. You can use it to storage most foods, including flakes, or crumbs. It is constructed of plastic material. The length of the fish feeder is 13.5cm, and width is 11.7cm. Whether you are at home or on vacation, this fish food dispenser is perfect for use. And you can use it to feed goldfish and turtle. Item Name: Fish Feeder Material: Plastic Battery: 2 x AA Batteries (Not Included) Features: Manual/Automatic Feeding, Large Capacity, Easy Installation Size Details: Size: 13.5cm x 11.7cm/5.31" x 4.61" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. How to Use: 1. Take down the feed tank, open the feed tank lid. 2. Load the feed. 3. Close the feed tank lid (the barrel lid is aligned with the feed tank card position). 4. Remove the fixing clip, install 2 AA batteries at the battery case and do not use old batteries), the feeder can operate. 5. The opening of the feed tank is loaded on the feeder, and the feeder feed is fixed on the tank towards the tank, keeping the feed cylinder and the fish tank level; Adjust the feed cylinder activity switch until the discharge volume is satisfactory. 6. Three feeding modes: free manual feeding, press the manual switch or select 12 hours or 24 hours to automatically feed once. (Note: The product has a built-in electronic circuit and cannot be dropped into water.) Package Includes: 1 x Fish Feeder (100g Food Container Included) 1 x Fastener Tape 1 x Fixing Clip 1 x 50g Food Container