Aromatherapy is a method of promoting moments of calm and relaxation. This Ultrasonic Real Bamboo Aromatherapy Oil Diffuser is extremely quiet and heat free. Ultrasonic diffusing is one of the best aromatherapy methods – fill the inner chamber with water and add a few drops of essential oil. Essential oils are not included with this diffuser however a list of calming essential oil suggestions is included with instructions. Choose your desired time 1 Hr or 2 Hr, then your mode intermittent or continuous. It diffuses up to 7 hours on continuous or 14 on intermittent, then shuts off automatically.