The House Aromatherapy Diffuser is both an aesthetically pleasing humidifier, and uses elaborate technology. The mist, which is generated by the vibration of ultrasonic waves, allows one to enjoy the scent of your essential oils. When the diffuser is on, a soft and comfortable LED light will illuminate to indicate its operating status. With its compact size, it can maintain proper humidity and diffuse your choice of oils in any room. When it’s been used for 5 hours or the water runs out, it automatically shuts itself off. Approx 3" wide x 4" tall.