Top Ten Tech New Essential Oil Diffuser Advanced Wellness Instant Healthful Mist Therapy (gray ) QUIET AND HIGH QUALITY : quiet, high-output, diffuser has advanced ceramic discs to prevent oil corrosion and meet your aromatherapy needs for years to come. Perfect for use in a nursery, spa, studio, home or office. RELAX: Fill the space it was with a lovely fragrance that can lift your mood and relieve stress from stressful and tired day, perfect for masking stubborn smoking and pet odors, get great and peaceful nights' sleep surrounded by the aromatic fragrance. ULTRASONIC OPERATION: humidify your living space to prevent dry, stuffy air and flu/cold germs infecting your loved ones. Prevent dry and chapped skin in dry winter months AUTO SHUT OFF: when water runs low - adds to safety, energy efficiency, and peace of mind- especially for use at night Easy to Use - To operate, fill reservoir halfway with warm tap water (note: not cold or purified water). Add 5 to 6 drops of essential oils if preferred and more water after misting begins. Be sure to add water with a cup (not provided) rather than fill beneath a faucet. Do not overfill. Specifications - Capacity: 150ml. Room Size: Up to 250 sq. ft. Run Time: Up to 4 hours (depending on mineral content of water).