Triple Action Cleaning System: dual edge brushes, unique brushroll and powerful suction to pick up dirt, pet hair and debris, even along edges & in corners Lithium Ion battery: lasting, powerful, hands-free cleaning Multi-surface cleaning: self-adjusts to easily cover carpet, hard floors, tile, and laminate Scheduling: program the robot to run when its most convenient for you Automatically docks and recharges. Cliff detection avoids stairs and other drop-offs