Our feeder has a compact and pleasing design. Veterinarian recommended for diabetic pets. It comes in 3 sizes – small (5 lbs), medium (10lbs) and large (20 lbs) and can be kept anywhere at home. Airtight covers on storage containers keep food fresh. Clear storage containers on feeders enable visibility from all angles and far distances. The large opening in the food store bin of the feeders enable easy restocking of pet food. This pet feeder comes with a detachable bowl for easy cleaning. Pet food does not have to be emptied from the storage container to clean bowl. Recommended food size: small pet feeder is 3/8″ diameter, medium feeder is 3/4″ diameter, and large feeder is 7/8″ diameter. The precise feeding of food is accomplished with this feeder by using high torque synchronous motor. Metal over molded self-lubricating nylon auger prevents jamming and provides a smoother and quieter performance. Food agitator is included in large and medium feeders to prevent food from getting stale. Safety interlock switch and safety baskets disable the feeder in the event that the storage container is removed. Our pet feeders have stainless steel protective sheathing on the cord to prevent pets from chewing the cord. Helps to maintain your pets health You can feed you pet at appropriate time UL and CUL approved Unlike vertical augers in other automatic dog feeders, our dog feeder has a horizontal feed auger system, which provides precise control over feed rate. All our feeders feature digital timers with battery backup for programs, the manual override switch, an 8 program settings per day and a daylight saving feature.