Singe Ultrasonic USB Anion Air Humidifier Cool Mist Home Office Decor Air Purifier Freshener Mist Steam Diffuser (pink) Humidifying, aroma diffusion purification,Quiet operation and low power consumption Removable tank easy refilling,Running up to about 12 hours without refilling Fashion small size, multipurpose, suitable for car, office, bedroom and etc Press ON/OFF button to start the device,For safety, item will automatic power off after 2 hours worked The efficient ultrasonic technology of this adorable humidifier is with high-frequency vibrations to generate a micro-fine cool mist, which is blown into the room where it evaporates into the air