The tisserand aroma stream aromatherapy diffuser enables safe diffusion of essential oils into the air with no need for flames or heat this clever unit diffuses oil through a stream of cool air which gently circulates the fragrances safely into the atmosphere a choice of two fan settings allows for greater control on the speed of the diffusion its perfect to use at night while you sleep as its safe to leave unattended has a quiet operation and benefits from low power consumption add