NebAir smart system is designed with 48 mode settings. You can tell NebAir how you your’d like your essential oil diffused by adjusting the settings. Changing oils is a breeze, no pouring, no mess, just screw your bottle directly on the atomizer. 64 timer & interval settings. Capacity 10ml Essential Oil Bottle. Run time up to 120 minutes. Coverage up to 50 square feet.