This 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 keep your pet not alone and not miss the meal 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, and keep diet,this automatic pet feeder built-in infrared sensor, when the bowl fills the size of the dry food that exceed 1 cm³, the machine automatically stops, preventing the pet food from clogging or overflow. The feeder can be powered by power adaptor or 3 type D batteries (Batteries not included). The batteries could keep feeder work for more than 6 months, no worry about power issue when you are not at home or holiday.