Petco Auto Fish FeederNever forget to feed your fish again. This battery operated digital unit dispenses flake or granule food to your fish. The digital auto feeder can be set with up to four feedings per 24 hours and with adjustable food portions so you can customize your fish feeding schedule. It's the safe, accurate, and easy way to feed your fish. Perfect for ensuring your fish are fed regularly while you're away and ideal for everyday feeding. Helps prevent overfeeding which can clog filters and pollute the tank. Simple knob control adjusts food quantity. Mounts to tank with clamp or operates free-standing from tank hood. Requires 2 AAA batteries and 1 5V battery, not included.