With only 2 AA batteries, it can operate continuously for about 12 months. The food case is suitable for flakes, granules, strips, etc. Applicable to aquarium and aquarium, fish newt frog can be satisfied with various fish Feeding time setting up to 4 times a day: Feeding amount can be set in 4 stages during the day, and feed can be added up to once in each stage. All settings can be changed freely. You can also feed once by pressing the "Manual" button. Two types of mounting methods: There are two mounting methods for the product depending on the style of the aquarium. It can be easily installed in the aquarium with a dedicated stand, or can be installed with a fixed seal. When installing it in the water tank, make sure it is above the water surface. Adjustable ration: Use the adjustment switch on the food case to adjust the food ration each time.