Mini shape, space-saving for your aquarium. Patented design for moistureproofing, mixing, and crumbling food. No jam, no clog and no fuss. Can fill the container with food without disassembling the automatic feeder. * Programmable food volumes and feeding times. By adujusting the slider, you may increase or decrease the amount of food dispensed per rotation. Works with dry loose flakes or pellets. * Up to four times setting in one day. The logo "Lo" displayed on the LCD indicates the power is low. * Powered by 2*AA batteries. (batteries included). Has a built in digital clock for accuracy. Can work both automatically and manually. A clear easy-to-read LCD screen which shows all info at a glance. * The feeder can be mounted in two ways (free-standing or rim-mounted) according to the shape of your aquarium. Safe and convenient. Simple operation and installation.