Designed to be extremely quiet and pleasant, absolutely no noise, heat or vibration. Perfect for use at night and during the day. Great for bedrooms, bathrooms, massage rooms, spas, etc. Can be placed on your nightstand, on the desk in the office, etc. Can also be used without oil as a humidifier. Easy to set up. You use add water using the provide measuring cup. Plug it a wall outlet. Adjust to your liking. You can turn the colorful lights or leave them off. You adjust the amount of mist which will determine how strong the aroma is, as well as how long the water lasts before it all evaporates. Auto-shut off when the water runs low. Specifications – size: 16cm x 9cm/water capacity: 100ml/operating time: 4 hours/coverage area: 25 sq. meters.