topPets PF-21B Remote Controlled Automatic Pet Feeder Programmable LCD Control with DC adapter Record a personal message for your pet, up to 8 seconds. Troubleshooting steps attached in teh images Ant-jamming food-hopper, For all sizes Dogs or Cats. Dry pet food from 1/4&quot; to 1/2&quot; in diameter. Uses 4 D battery or AC Power, DC Power adaptor is included. Infrared remote controlled receiving system. Remote range:10-12m without barrier. Programmable portion sizes and feeding frequency. Large volume - 45 cup (10.65L) capacity, Programmable portion sizes - 1/4 cup to 2 1/2 cups, Programmable feeding from 1 to 5 times daily.