FLEXIBLE MEAL SCHEDULING：The programming is straightforward, and you get a lot of flexibility to set specific meal times and portions. The hopper holds up to 29 cups of dry food. You can then program the timer to dispense up to 4 meals a day. Set a specific time for each meal and how much food will be dispensed for each meal time. Portion sizes range from 2 teaspoons to 4.5 cups dry food.pets get fed while you are away from home 2 to 4 days. LARGE CAPACITY HOPPER：Roffie feeder comes with a massive 7 liter (29 cups) hopper. When filled with pet food, it can last a few days to a week depending on how much your pet eats. This is great for pet parents with a very busy schedule or singles who travel for days at a time. With this unit, you can only use dry food with kibble between 0.2 and 0.6 inches in size. This ensures that food is dispensed smoothly without jamming. RECORD CUSTOMIZABLE MESSAGE: You can record a customized message up to 10 seconds to remind your pet to know its mealtime by just press and hold the MIC button to be played for each dispense. NEVER MISS A FEEDING - The automatic cat feeder is powered by power adapter and 3 D-size batteries. In case of power outage, the feeder will continue to function on 3 D-size batteries to assure your pet never miss a feeding. (Batteries are NOT included) USER FRIENDLY DESIGN - Top lid forms a type of seal so that the kibble stays fresh and so that your pets receive the food they need. Removable food container and ABS housing for easy installation and cleaning.