Features: 4 in 1 function, air humidifier, ultrasonic aroma diffuser, 7 colors night-light and air purifier. This aroma diffuser can hold up to 200ml of water and produce up to 17-30ml of moisture per hour. Working time lasting up to 12 hours. Aroma diffuser support 20 square metres, air humidifier support 10 square metres. 7 colors night-light, the light color will be gradually chaging, low noise, ensure a good night's sleep for family. High-quality PP material and wood, low power supply, automatic power-off when water used up, ensure use safe.