Designed with convenience in mind, the Roomba® 681 Vacuuming Robot cleans on a schedule or at the push of the CLEAN button, automatically returning to its Home Base™ to recharge between cleanings. Roomba® 681 uses a 3-Stage Cleaning System to easily pick up dust, dirt and debris. Sensors detect dirtier areas so that Roomba® can perform focused cleaning where it's needed most.