Humidifier: Get a USB oil diffuser humidifier. Fire: Includes a flame light mode that resembles a real flame! Oils: Add essential oils to diffuse them into your room for beautiful aromas all day long! Automatic: Features an automatic shut off function when there is a lack of water. Size: Water tank capacity of 180ml, with a use time of 9-12 hours. USB: The humidifier is powered by a 5V2A USB cable. Usb Oil Diffuser Humidifier | Living Social