The automatic fish feeder works in manual or automatic mode with intervals of 12 or 24 hours and is suitable for food of different compositions, small and large granules, powder. The feeder will provide regular and once-a-day feeding, which is enough for adult fish. Powered by two AA batteries. The batteries last on average 3-6 months. The feeder can be mounted on the wall of the aquarium - on a bracket - or on the lid using an adhesive surface - the feed is delivered through a hole in the lid of the aquarium. The set includes two containers: 50 g (100 ml) and 100 g (210 ml). The main body of the product is that the fish food does not become damp and keeps it fresh for a long time. Due to its ease of use, the automatic feeder will become your indispensable assistant in feeding your fish. Now you never have to worry about being away from home or for long periods of time Customer! Check the operation of the feeder before leaving. Let the feeder run for 3-5 days so that you can let your pet feel confident and calm. Thank you for your choice This model is powered by 2 AA batteries, but batteries are not included with this product. Note: The data are all manually measured, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.