The Wagner 0530004 SMART Flow Roller makes painting a room in your home easy, convenient and mess-free. This innovative paint roller holds up to 22 oz. of paint directly in the handle reservoir to paint up to 70 square feet in one fill. This eliminates the need for messy and back-breaking roller trays that require constant bending and stooping to refill. The home painting tool also features battery powered technology, which is used to electronically draw paint directly into the handle and then feed it to your painted surface. You can also switch to the ?Manual? setting to manually feed paint to the roller cover and paint your walls. The roller is perfect for medium-sized projects such as painting a bedroom, kitchen, living room and more. Plus, the extended handle lets you reach 8 ft. tall ceiling with ease, reducing the need for a ladder, stepstool or extension pole. It's the perfect tool to have for your next home improvement project.