Round Large Capacity Water Tank: 600ml water tank can meet long time aromatherapy, but also can be used as a humidifier. Perfect for home, office, gym, etc 2 Powerful Mist Mode: strong mode can be used for 9-10 hours, weak mode can be used for 15 hours, no need to refill water several times a day. Further Quietness: specially designed Silencing Device in the water tank, it reduces the flow of water.Make this diffuser quieter than the common one. Easy & Safe: only 3 steps to use, easy but safe.This essential oil diffuser without heating will auto shut-off when water runs out. Pleasant Gift: Aromacare home products have been bringing you exquisite enjoyment for 15 years, and our excellent team will give you the greatest satisfaction.