Sleep in total silence. No need to tolerate hums and whistles. The peaceful sleeping atmosphere for you.and safely every night thanks to the auto-shut off feature and nearly silent operation. HUMIDIFIER NIGHT LIGHT: Besides its functions as a humidifier and uses in aromatherapy, this essential oil diffuser also gives off good light that can easily function as a night light. It’s great to fit for the room, home, office and everywhere you want to put it. IMPROVE AIR QUALITY AND FEEL RELAXING: The oil diffuser with some aroma will add the amount of moisture to the room to improve your home's air quality and cover the smell of pets or smoking. WATERLESS AUTO-OFF & SLEEP MODE The scent diffuser features a 300ml water tank with adjustable cool Mist Mode, when time is up or there is no water, it will turn off automatically to keep the peace of your mind and ensure your safety. QUIET AND HELP YOU SLEEP: This air diffuser uses ultrasonic technology to work quietly without disturbing your and your baby's sleep. Add a few drops of your favorite good essential oils for a relaxing scent, and enjoy a great night's sleep anytime.