EUC. Sells @ Petsmart for $86.99 plus tax. When you can't be there to feed your pet or want to control potion sizes. Comes with instructions. Great for cat or small dog. Runs on 4 D batteries (included in price) so can place feeder anywhere. CHECK OUT & WATCH youtube vid that shows how this works: https://m.youtube.com/watch?v=OxbbrinPgx8