Quantity: one set The aquarium automatic feeder can set stable quantitative feeding, so that you can go out without worrying about being fed.The moisture barrier 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 feeding, etc. You can choose the appropriate feeding tank according to the feeding amount of the aquarium, avoid frequent feeding, avoid food accumulation and dampness. 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 Velcro fixed fish feeder is suitable for closed aquariums. Retaining clips can also be used to secure water lines.