Our medium-sized ultrasonic electric Oil Diffuser is made from blown glass with a hand-painted finish. It has a capacity of 100 ML and can run for up to 4 continuous hours of continuous scented mist or 8 hours of intermittent scented mist. It has 8 LED colored lights that cycle through providing additional ambience in any room and it comes with convenient automatic shut off. Simply fill the tank with water to the fill line, add 5 drops of your favorite essential oil, replace the lid and decorative sleeve, and turn it on. Instruction booklet is included. Out of the box it is 7 inches high by 4 inches wide,