iRobot Clean Base Automatic Dirt Disposal, Compatible with Roomba i SeriesFeatures: Automatically empties your Roomba robot's bin You don't have to think about vacuuming for weeks at a time. Anti allergen technology system captures and traps 99% of pollen and mold allergens. Uses enclosed, disposable bags for easy disposal without the cloud of dust Holds 30 bins of dirt, dust and hair