130ml capacity. 2 level mist control. Low water level cut off. 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. 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 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. The Wellbeing essential oils will work perfectly with the Aromabotanical ultrasonic diffusers.