HighlightsWHISPER QUIET AT NIGHTDetails*Features* - **WHISPER QUIET AT NIGHT* - With low noise of 36dB produced(quieter than page turning),it won't disturb you of working,studying or sleeping. Far away from those noises. Ideal for babies,kids and light sleepers.**220ml WATER TANK & 4 HOURS AUTO OFF* - Designed with a 220ml water tank and around 50ml/Hour output mist,our ultrasonic air humidifier can continuously work for 4 Hrs or waterless will auto off. Suit for 215-322 Squa ft bedroom/office/l