1、ADVANCED MOISTURIZING TECHNOLOGY: This humidifier uses high frequency vibration mist humidification technology. Not only does it create ultra fine water mists, but it also generates a vast amount of negative ions to ensure a proper humidity level in your home. 2、2 COLOR LIGHTS: The train shape aromatherapy diffuser comes with 2 light modes, warm and cold blue light, making the train shaped diffuser more realistic, giving you the bright, refreshing feeling and comfortable warm environment you want. 3、MULTIFUNCTIONAL OIL DIFFUSER : The humidifier also doubles as an oil diffuser, allowing you to experience the advantages of aromatherapy. Just add 2‑3 drops of your favorite oil and enjoy the subtle fragrance that helps relax your body and mind. 4、SAFETY ASSURED: The train humidifier is equipped with a water shortage power off guard function, preventing dry burning. It's intelligently designed with a built in water shortage guard chip, and it automatically stops working when water is detected to be insufficient. 5、ELEGANT AESTHETIC DESIGN: This tabletop humidifier features a stylish design with a train shape and a fashionable antiqued bronze color scheme, offering not only functionality but also a touch of elegance. It makes an excellent gift choice for family and friends.