Optimus U-31001 1.5-Gallon Cool Mist Ultrasonic Humidifier

Operates up to 18 hours; Water-empty auto shutoff switch & refill light; Adjustable mist volume control; Easy-to-fill transparent water tank; Whisper-quiet operation; Removable tank with handle for easy filling; Moisture output more than 230mL/hour; cETLus approval;