4 Time Modes - 1H/2H/3H/On. The diffuser will stop working when it reaches the time setting. Ultrasonic Humidifier - Humidify your living space to prevent dry, stuffy air and germs by adding water molecule in dry days. Aroma Diffuser - Send fragrance into the environment wherever you are in working or leisure with your favourite essential oils. Safe Operation - It will automatically shut off when the unit tilts or there is little water inside to keep safe if you are out or in sleep. Adjustable LED Lights - You can choose among 7 colors between bright & dim. Each color can be set steady on or changing in turn.