LEVOIT Humidifiers for Baby Bedroom, Top Fill Cool Mist for Kids Nursery, Plants with Essential OilThe modern Dual 100 has a mist output of up to 220 mL h and a 3 foot mist height, making your bedroom or office comfortable in minutes. With a run time of up to 20 hours. The built in humidity sensor can read the room's current relative humidity level and automatically adjust mist level, maintaining comfortable humidity at all times. Select Sleep Mode and the Dual 100 will keep noise levels as low as 24dB and automatically turn off display lights. The