This Automatic Fish Feeder can feed your aquariums fish for the right portion timely. Its unique swirl control is smooth and silent, no clogs & no jamming at all, regardless of pellets or flakes fish food. It can adjust the food amount into the right portion. Programmable Auto-Feeder suitable for pellet Fish Food, up to 4 times per Day. Digital operation will last for days until main bowl is empty (~20 days with light 1 feed per day). Specifications: Size: 144*99*156mm 2*AAA Battery(NOT included) Larger DrumPackage Included: 1 x Aquarium Auto Feeder 1 x Manual