The Eheim Feed-Air Digital Auto Feeder lives up to the Eheim name. Every feature possible is contained in this attractive container. The electronically controlled programming allows up to 4 daily feeding cycles of flake food in either single or double serving sizes. The large, easily read LCD display/clock also shows the programmed feeding times. Food level monitoring is easy performed through the clear food container. The integrated ventilator prevents moisture from spoiling food or clogging the unit, so maintenance is almost non-existent. This unique feeder uses every last flake in the bin to prevent waste. Replace the battery every 6 months or so and this auto feeder will keep you and your tank critters happy for a long, long time. Battery driven electronically controlled programming allows up to 4 daily feeding cycles of flake food. Single portion, double portion servings with 1-minute interval, or manual override. Integrated moisture prevention system. Programmed times are shown on a large, easy-to-read, LCD display/clock. Dimensions: L: 5 1/2\" W: 2 1/2\" H: 3\" With a simple press of a button “snacks” are also possible at any time. The function keys are splash proof . A warning system quickly shows low battery level. Capacity ca. 100 ml Function keys are splash resistant