This Tranquillity diffuser uses electricity to fill your home or office with soothing, calming aromas. Its mist effect can be used as a purifier and humidifier and lasts up to 5 hours off a fill of 150 ml of water. Use the colour-changing light and some essential oils (not included) to create a peaceful vibe in your home or office that will have you feeling more relaxed than a millionaire getting a massage on holiday! | Aroma Home Tranquillity Colour-Changing Diffuser