The bowl of essential oil diffuser has a large capacity of 600ml that supports at most hours working time, various by preset modes like big or small mist, intermittent or continuous status. ^ It is suitable for large rooms . Pour some clean water into the bowl to reach the max level line, and add a few drops of aromatherapy oils into the water, then turn it on and start to enjoy the fragrance.^ The aromatherapy diffuser can be also used as a small night light. ^ It has built-in 7-color LED lamps that can work in gradual change mode or staying mode. Running with no noises makes it sleep-friendly at night.^ This scent diffuser can be set to run within 60, 180 or 360 minutes per using and the corresponding indicator will be lighted up. When there is no enough water for normal using, it will turn off the mist function automatically to protect the inner vibrating structures and avoid wasting of energy. No worries about safety.