1.Mini shape, space-saving for your aquarium. 2.Can fill the container with food without disassembling the auto feeder. 3.Programmable food volumes and feeding times. 4.By adjusting the slider you can increase or decrease the amount of food dispensed per rotation. 5.Has a built-in digital clock for more accuracy. 6.A clear, easy-to-read LCD display that shows all information at a glance. 7.Safe and convenient. Simple operation and installation.< /p> 8. Can work both automatically and manually.