Usage Tips:Automatic & Timer FeedingAuto fish feeder can be operated automatically or manually, making fish-keeping easier. It is great to feed your fish at a scheduled time (once or twice per day), at the same time, you can also feed manually and experience the fun of feeding.Battery Operated & Two capacityLarge capacity: 210ml/100g; Small capacity: 100ml/50g. Powered by 2 x AA batteries (Not included), can last for 2~4 months. This auto fish feeder is great for daily use whether you are at home or away. No more worry about fish feeding even you are on a business trip.Two Different Fixed MethodsOur fish feeder is designed with 2 install methods to meet different needs. One is to fix the feeder to the tank wall by using the holder. Another is to paste the feeder with double-side sticker on the tank cover.Moisture-ProofThe hopper with Moisture-resistant design keeps food fresh and dry from getting wet or jammed. The fish food dispenser is suitable for various fish foods such flakes, pellets, powders and strips.Simple Install MethodAttention: It is recommended to test the amount of food poured out is sufficient or not by sliding the control slider before using. Using a fisher clip, install and hold the fish feeder on the edge of the tank, make parallel with the tank.