Two types power supply: charged by USB or batteries, no need to buy batteries repeatedly, which is energy saving and environmental protection. Long work time: Powered by a large-capacity lithium battery, it can be charged and discharged up to 800 times. According to the number of feedings set, it can be used for 3-6 months on a single charge. Large capacity: 200ml large-capacity feed bucket, suitable for a variety of fish feed such as granules, flakes and powders. Intelligent design: You can set up to 4 feedings a day, feeding 1-3 times each time. At the same time, you can also feed manually and experience the fun of feeding. Fits for 600L (158 US gallons / 131 UK gallons) fish tank, the feeder can perfectly feed goldfish and turtles on weekends or holidays.