The Aromabotanical Wellbeing essential oils will work well with the ultrasonic diffusers. Choose from five aromatherapy blends (sold separately) to suit your mind and body wellness. Vaporise - The Aromabotanical ultrasonic diffuser/vaporiser makes ultrasonic vibrations through water. These vibrations transform water into a cool vapour without the use of heat, ensuring the essential oils diffused are retained in their purest form, and released in a fine mist which can easily be inhaled and absorbed. Humidify - The ultrasonic waves created by our diffusers stimulate moisture in the air to combat the drying effects of heating and air-conditioning, leaving your environment clean and comfortable. Purify - By releasing negative ions, the Diffuser purifies the air in a room of dust, bacteria, pollen and household odours. Illuminate - Your diffuser can move through a series of relaxing colours, with the option to set to a desired colour for a fixed period, or return to oscillation. The soothing colour spectrum aids natural sleep, with the red setting scientifically proven to help produce melatonin for an easier transition to a deeper sleep cycle. 80ml capacity. 2 level mist control. Low water level cut off.