Quantity: one set The aquarium automatic feeder can set stable quantitative feeding, so that you can go out without worrying about being fed. The barrier against humidity has been improved so that the freshness and dryness of the fish food is significantly prolonged even if the water vapor in the aquarium evaporates. The automatic fish feeder has an adjustable outlet, suitable for feeding a variety of fish feed, such as pellet feed, pellet feed, flake feed, strip feed, etc. > You can choose the appropriate feeding tank according to the feeding amount of the aquarium, avoid frequent feeding, avoid food accumulation and moisture. This model is powered by 2 AA batteries, but batteries are not included with this product. The clip-on fish feeder is suitable for open aquariums and the fixed fish feeder is suitable for closed aquariums. Retaining clips can also be used to fix the water pipes. Good quality product Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.