Lifegard Aquatics Intelli-Feed Aquarium Fish Feeder w/ 6V Power Adapter Includes 6V Power Adapter. Can also run on 4 AA batteries Pre-programmed for 2 feedings per day (8AM and 6PM), and can be programmed for up to 12 daily feedings Both flake & pellet fish food are protected from humidity rising from aquarium Includes a versatile tank mounting bracket, rubber suction feet and simple digital keyboard instructions Length, 4.53"; Width, 3.07"; Height 3.66". Food Capacity 7.5 cubic inches.