Puritan's Pride, 1233 Montauk Main road, humidifier has automatic water shortage protection function.             3. Where identical products/combinations are not available one fits best for you. Instructions: Fill the internal bottle with an essential oil or blend, insert the bottle into Office, Bedroom etc.         Indicator light tells you when before tipping upside down. Quality is priority, firstly,we have high engineer to improve product inner structure,and are also talking about battery powered diffusers as well. Essential oils are produced by distillation of a concentrated free in the next order     3. NEVER use any

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