Lampick Model: DU-F07K The automatic cat feeder allows you to schedule 6 meals in advance and up to 15 portions per meal. Also, a manual feeding button makes it easy to give your pet a snack. LAMPICK cat food dispenser is a good assistant to take care of your cat/dog! Use the DC 5V adapter to power the automatic cat feeders. Alternatively, install 3 alkaline D-size batteries (not included) . We recommend using both battery and adapter. In the event of a power outage, the cat food dispenser will continue to run on 3 D-size batteries to ensure your pets never miss a meal. Recommended 15-35 days for cleaning food tank)