Features: Two types power supply: USB charging or 2 pcs AA batteries. Long work time: Energy saving. According to the number of feedings set, it can be used for 3-6 months by 2 AA batteries. Large capacity: 2 feed buckets, 100ml capacity and 50ml capacity, suitable for a variety of fish feed such as granules, flakes and powders. Intelligent design: You can set up to 2-3 feeding modes. At the same time, you can also feed manually and experience the fun of feeding. Wide applications : 2 installation ways make the auto fish feeder is suitable for both aquarium with lid and open fish tanks. The feeder can perfectly feed goldfish and turtles on weekends or holidays. Package Includes: 1 Set Automatic Fish Feeder (AK01J/AK01S/AK02) Specifications: Material: Plastic Color: Black Style: AK01J/AK01S/AK02 Size (Approx.): 12x8x14cm/4.72x3.15x5.51in Weight (Approx.): AK01J-395g AK01S-398g AK02-400g note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!