[Humidifiers for Large Room & Bedroom] The 2.11-gallon ultrasonic humidifier is designed for large rooms up to 500 sq ft & long lasts for 24 hours humidification between refill. [Top Fill Design Humidifiers with Essential Oils Tray] Features a 2.1 Gallons detachable water tank, you can easily open the lid to add water from top without bending over! [Customized Humidity & 3 Speed Options] It has an adjustable humidistat, with 3 levels of humidification, and a maximum of 300m L/h fine mist output. [Whisper Quiet & Water Shortage Protection] This large capacity humidifier runs below 35d B, which promotes a good nights sleep for the family, especially the baby! [30 Days Free Replacement & 1 Year Warranty] We firmly stand behind our products.