Black Digital Automatic Aquarium Fish Tank Food Feeder Timer Home Automatic fish feeder feeding machine for aquarium - Auto food fish dispenser for fish tank Fish Feeding times can be set to once or twice daily, feeding drum is ideal for flakes or granulates The auto feeder Drum: diam. -C 6.5cm/2.6"; height -C 2.7cm/1.1" The fish feeder Measurements: approx. 11cm/4.3" (H) x10cm/3.9" (L) Battery Power Source: 2 AA 1.5V alkaline batteries (NOT INCLUDED)