TOOGOO(R) AUTOMATIC AQUARIUM POND FISH FOOD FEEDER DISPENSER TIMER FOR FISH TANK/BOWL With this automatic fish feeder you can feed your fish up to 2 times a day. It can feed your fish for the right portion timely. Its unique swirl control is smooth and silent, no clogs & no jamming at all, regardless of fish food in pellets or flakes. Power Source: 2 AA 1.5V alkaline batteries (NOT INCLUDED). Measurements: approx. 11cm/4.3" (H) 10cm/3.9" (L).