This portable rainbow fairy humidifier is easy to use. You can take it with you anywhere, all you need is a USB for added on-the-go convenience! Just put it in a mug/glass bottle, and it will give you 2 hours of mist. Travel Humidifier It can be placed in almost all types of cups/jars. Portable design can easily fit in your bags, suitable for home, office, car, hotel, dorm, camping and outdoor. USB charge with 600mAh battery capacity. 2 Different Modes 1.Rainbow light mode: press to turn on humidifier & rainbow light, press again to turn off. 2.Soft light mode: long press to turn on humidifier & soft light, press again to turn off. (Rainbow light & Soft light may turn on together.) Ultrasonic Humidifier Spray amount reaching 60ml/h with 99.99% of humidifying rate. Also suitable for largish room, living room, bedroom, car, baby room, dorm etc. *No water bottle included.