This beautifully designed diffuser has a continuous mist that lasts up to eight (8) hours and an automatic shut-off feature. To use, pour water to fill the line inside of the diffuser basin and add a few sprays or drops of essential oils. LED light settings can be used to adjust color mode or can be set to one color, eight (8) color choices to choose from. Plug-in to any regular electrical panel. The cover of the diffuser is made of classic frosted glass; the water and the oil basin are made of thick plastic casing. Never submerge unit in water. Use a soft cloth to clean inside surface, and wipe dry. Do not use abrasive cleaners. Do not wash or wet the outside of the frosted glass.