This beautifully crafted diffuser has an automatic shut-off feature with a continuous mist that lasts up to eight (8) hours. To use, pour water inside the diffuser basin to fill the line and add a few drops of essential oils or fragrance oils. The LED light settings can be used to adjust color mode or can be set to one color, with eight (8) color choices to choose from. Plug-in to any standard electric panel. The cover of the diffuser is made of classic frosted glass; the water and the oil basin are made of dense plastic case. 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.