OVERVIEW: Forget about vacuuming for months at a time with the Clean Base Automatic Dirt Disposal that allows the i7 to empty itself for up to 60 days.Runtime 75 minutes. Forget about vacuuming for months at a time with the Clean Base Automatic Dirt Disposal that allows the s9plus to empty itself for up to 60 days. Pulls in stubborn and messes with a Premium 3-Stage Cleaning System and 10X the Power-Lifting Suction. (Compared to the Roomba 600 series cleaning system). With vSLAM navigation, the...