Features:USB Powered: Mini size and USB powered make it easy to carry and power. You can connect it with PC, laptop, car charger or any other USB outlet.No water tank: No water tank design, small flower humidifier. Small and portable, silent humidification, automatic power off. You can replace different containers according to your own needs.Useful Function: Make sure there is enough water before running. Suitable for bedtime, working or study, great humidifier for baby room or office.Mini Portable: Easy to use, compact size, saving space and portable.It can moisturiing your living space to prevent dry, stuffy air and flu infecting your loved ones.Aroma Essential Oil Diffuser: This personal humidifier with aroma essential oil diffuser function, You can add a few drops of your favorite essential oil to give your room or car a pleasant scent.. Color: Blue, Materials: ABS, Size: One Size: 5cm x 5cm x 2.7cm, Care: N/A