In Australian dry climate, it's important to keep yourself moisturised, even in your office. This ultrasonic diffuser waves create air moisture to combat the drying effect of heating and air-conditioning. Keep your skin moistured all the time. By releasing a large number of anions, it creates reactions with dusts and impurities in the air and in turn purify the air, removing allergies and odours. Combines with your favourite essential oil, it will also assist in cleansing and getting rid of air-borne bacteria. Live in a clean fresh air anytime. Comes with 7 LED colour night light, you can always choose the one you like to end the night with. When it's down to low water level, it'll automatically shut off that makes it safe to use anytime, anywhere.