Long-lasting operation, reduced water refills: Equipped with a large 4.3L tank, the AIRROBO humidifier can operate continuously for up to 5 nights (approximately 43 hours), eliminating the need for frequent water refills. More comfortable in less time: With a powerful and stable mist output of up to 300ml/h, it increases humidity by 10% in just 20 minutes. It alleviates dryness faster, providing a comfortable space in minutes. Convenient top-fill design: No need to flip the unit over. The top-fill design makes refilling and cleaning quicker and easier. Amazingly quiet operation: Equipped with advanced Calmist 3.0 noise reduction technology, noise is reduced to 26dB in sleep mode. It won't disturb your sleep, making it ideal for those sleeping in the bedroom and for babies. Multiple mist settings & 360-degree rotating nozzle: Achieve ideal comfort with 3 adjustable mist output settings, and direct the mist in any direction with the 360-degree rotating nozzle. s304