The Eheim Automatic Feeder 3581 -autofeeder- is a electronically controlled feeding unit for up to 4 feeding times daily with choice of single/double portions. The compact Eheim Automatic Feeder is operated by batteries (included). The actively aerated feeding chamber gives dry food down to the last flake. With manual release button and LCD clock function. Low battery level indicated on display and splash proof buttons. Double dosage of the food is also provided in the programming. Snacks between meals are possible at the press of a button at any time.Eheim autofeeder+ Active ventilation provides dry food right down to the last flake+ simple programming for feeding intervals and adjustable feeder opening for changing feeding amount+ also snacks via a simple push of a button+ low battery level indicated on display+ splash proof buttons+ including holder for mounting at open aquariums or terrariumstechnical Data Eheim Automatic Feeder 3581:compact dimensions: (length x width x height) 14