The beautifully designed ultrasonic aromatherapy diffusers offer a sophisticated way to fill your space with the scents you love. With essential oil, cold water and ultrasonic vibrations it creates a cold mist that can scent a space up to 150 sq. ft. Also features a timer 60, 90, or 120 minutes and 7 soft LED lights that rotate or can be fixed on one color or no color. White/ dark wood base. Glass cover Window Box. 90mm Diffuser. Timer 60, 90, 120 min., Continuous 4 hrs., 7 LED light.