Used condition. Cleaned out best possible. Only used doterra oils in them. Mainly onguard. Works great. it is designed to create the ultimate level of comfort in any room. Its smart sleep mode maintains ideal humidity levels throughout the night, helping create the perfect environment for a good night’s rest. Water capacity: 1.8 L / 0.48 gal Suggested room size: 270 sq ft / 25 sq m Continuous operation: high mist—up to 7 hours, medium mist—up to 12 hours, low mist—up to 22 hours Automatic adjustment in sleep mode to maintain comfortable humidity levels Easy disassemble for cleaning No lid removal to add water and essential oils Low noise level Automatic safety shutoff