a beautiful scenery at home toiet water,drive mosquito&mite alcohol,can sterilize vinegar,drug, ... Usage:1. Open the cover & tank cap;2. Fill water into water tank; 3. Add 3-4 drops essential oils into ... water; 4. Close tank cap & cover;5. Connect the power, & ... power, but strong humidity.7. Auto-off when no water.8. External transformer isn't harmful for human body.9 ...