Ultrasonic technology-ultrasonic humidifier suitable for large rooms has high-frequency technology, which can convert water into fine and evenly dispersed fog; Very suitable as a bedroom humidifier, suitable for family rooms up to 426 square meters. foot Top-filled humidifier–The easy-to-fill water tank can hold 1.47 gallons of water, and each filling can provide up to 70 hours of cooling spray running time. Quiet and convenient-very suitable for night use, quiet operation and built-in nig