Featuring a 1-gallon tank, this units 40-hour runtime ensures that you can free your mind and not worry about refilling the unit. The included Pre-Soaked Aroma Pads enrich the air in your space with either lavender or eucalyptus aromatherapy. Relax further with the unit's adjustable nighttime glow, the soft lighting through the water offers a peaceful ambiance, allowing a good night's sleep. Personalize your humidifier experience with the adjustable mist level. The user-friendly transparent design makes refilling and cleaning both simple. The unit will automatically shut off when out of water, protecting you and your device. This unit is both ETL Certified and backed with the Winix 1 Year Warranty.