The humidifier disperses cold mist into the air, which helps to humidify the air in the room. There are 3 selectable fog levels, from which you can choose according to your preferences or current situation. To ensure health safety, water molecules are "sterilized" by UV-C light before being released into the environment, which removes most potential bacteria.
If you want to refill the water, just open the water tank from above and pour in. The tank has a volume of 4.5 liters, so one refill is enough to create a mist for 12-15 hours. The sterilization and misting process itself is quiet, so you can leave the device on overnight.