The humidifier uses UV-C ultraviolet sterilisation technology to eliminate bacteria, and then releases purified mist to cleanse the surroundings. The UV-C ultraviolet sterilisation technology eliminates up to 99.9% of bacteria* before the water is released into the stream of mist. The humidifier releases up to 350 mL of ultra-fine water droplets per hour to prevent a dry indoor environment. Thanks to the large 4.5L tank, the humidifier can operate continuously for up to 32 hours without a refill. Quickly responds to changes in humidity to maintain a comfortable environment. Mist output is automatically adjusted to keep humidity at optimal levels and prevent wet furniture. The humidity is automatically kept at 60% for optimal comfort. The humidity settings can be adjusted in the Mi Home app. Connect to the Mi Home app to access the full range of functions, including the timer and mist output. Refill the water tank in an instant. Add water without removing the water tank. Lift the tank for cleaning or adding large amounts of water. The water tank features a transparent water level indicator so that you can keep an eye on the water level without lifting the lid. The humidifier features a cutting-edge rotating mist dispenser, which rotates 360° to provide whole-room coverage without the need for constant repositioning. New floating plate structure moisturises the air with minimal noise to ensure you get a good night's sleep. All-new aromatherapy diffuser infuses the air with essential oils to create a soothing atmosphere.