This Smart Automatic Pet Feeder provides flexible meal portions from 1 to 20 portions per meal, 5g for every portion, and the container capacity is 3.5L. With voice recorder and speaker, this feeder can record your voice for 12 seconds to call your puppy or kitty for meals. Your personal sound will alert your pet and let them know when the food is ready. After setting the food volume for each meal, the accurate food volume will help your pet keep a good habit to eat at regular hours. This Smart Automatic Pet Feeder has a built-in infrared sensor. The size of the dry food should not exceed 1 cm⊃3 or the machine automatically stops, preventing the pet food from clogging or overflow. The feeder can be powered by power adapter or 3 type D batteries (Batteries not included).The battery can keep the feeder working, no worry about power issue when you are not at home or holiday.