The EHEIM automatic feeding device runs on batteries (included). An actively ventilated feed container provides a dry feed supply to the aquarium without any residue. The device is easy to program and you can use it to set the time of feeding the fish. The programming provides for the possibility of serving a double portion. By pressing a special button at any time, you can arrange a small "snack". The warning system will inform you if you need to replace the batteries. Capacity-approximately 100 g. New: on this model, the buttons are protected from water ingress. This model is a bestseller and is indispensable when you leave - you do not need to ask anyone to take care of your fish.