Integrated 22 fl oz paint reservoir, no paint tray required. 70 sq ft coverage in a single fill. 9" internally fed roller, even finish, and application control. Battery operated at push of a button (4AA batteries included). Increased productivity for large rooms, low user fatigue. Extended reach for walls and ceilings. Manual override. Refer to replacement roller cover SKU 770965 (3/8" nap) or SKU 770949 (3/4" nap).