Green Air`s Amber Glass Diffuser is an elegant way to enjoy the benefits of essential oils. This diffuser uses high-frequency ultrasonic electrical vibrations to create an ultra-fine mist. This diffusion method does not use heat, so it maintains the integrity and holistic properties of essential oils. Green Air`s Amber Glass Diffuser holds up to 5 ounces and has a 5 hour run time. It can be used in continuous mode, or 1 and 2 hour timed increments. Equipped with three light modes, this diffuser is stylish enough to display and can be dimmed for a soft ambience. You simply have to fill the reservoir and add 3-5 drops of essential oils.