1) It's waterproof and independent2)When you go out for a long time, you can use it to feed fish automatically3) It can also be used when you are at home, so you don't have to feed the fish every day4) It's very convenient to feed the fish.5) Feeding every 12 hours or 24 hours6 ...1) It's waterproof and independent2)When you go out for a long time, you can use it to feed fish automatically3) It can also be used when you are at home, so you don't have to feed the fish every day4) It's very convenient to feed the fish.5) Feeding every 12 hours or 24 hours6) one or two feedings can be set up within one day7) The amount of food allocated is adjustable8) After rotating the rotor, it will rotate and stop at the feeding stop position9) Battery type: 2 - AA battery (not included)10) Removable food trough, easy to clean11) Size: 11cm x 10cm