The Bliss Opal Essential Oil Diffuser is a beautiful glass diffuser and can be customized by choosing from two levels of mist intensity. Incorporate the shut-off timer to further personalize your experience. The Bliss Opal Essential Oil Diffuser automatically shuts off when little to no water remains in the tank. Up to 12 Hours of Continuous Mist Large Room Size White Light or Off Light Modes 150mL Water Capacity Includes cETLus certified AC adapter Automatic Safety Shut Off