The automatic fish feeding machine works in manual or automatic mode with an interval of 12 or 24 hours and is suitable for feeds containing different ingredients, small particles, large particles and powder. The feeder will provide regular feeding once a day, which is enough for adult fish. Powered by two AA batteries. Batteries last on average 3 to 6 months. The feeder can be mounted on the aquarium wall - on a stand - or on the lid using an adhesive surface - the feed is distributed through the holes in the aquarium lid. The set includes two containers: 50g (100ml) and 100g (210ml). The main thing about the product is that the fish food is protected from moisture and remains 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 leaving home or being away from home for long periods of time. Product size: 14*8*15 cm Note: The data are all measured manually, please allow 1-3 cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.