Petwant F4 LCD Automatic Cage Feeder can be fixed outside of the cage, which saves space in the cage. You can set at most 4 meals a day and 20 potions (1 potion = 12ml) a meal to care for your lovely pets whenever and wherever you are. A dual power supply system guarantees to serve meals and your pet's safety even in a blackout. 2.3L large capacity food bucket helps you get rid of frequent food adding. Suitable for most small pets such as cats, dogs, rabbits… etc.