Aroma diffusion and humidification : Drop the essential oil (2-4 drops) into the water tank for atomization, keeping the air moistened for pressure relief. 3,000,000 times/ sec vibrating frequency for atomization : USB power supply, fine and uniform mist output with up to 3,000,000 times vibrating frequency. Silent care : Built-in turbofan, bigger air flow, higher mist jetting , lower noise level. Automatical power off : In case of insufficient water, the aroma diffuser will be powered off automatically to ensure safety. Nursing bottle-class material construction : Use nursing bottle-class PP material for purpose of environmental protection and health. 7-color gradually changing atomosphere lamp : Gradually changing 7-color breathing lamp with color fixable, creating a romantic and sweet atmosphere