Adjustable Length Stick: The portable humidifier is adjustable in length, so it can be combined with different containers. Such as mugs, ordinary glass bottles or mineral water bottles, there is no water tank, thus breaking the inherent container restrictions. NOTE: Water bottle not included. PORTABLE & SMALL SIZE: Portable design, perfect for travel accessories. Small size, easy to carry around. It goes anywhere, and you can plug in a USB for added mobile convenience! Ultra-quiet mini humidifier: The power-on indicator light is on, and it will automatically shut down after 5 seconds. Silent humidification with DC power supply to achieve silent and healthy humidification. Do not disturb your work and rest. This humidifier can virtually help improve your sleep quality. When you put it on your nightstand, you can barely hear it. High-quality design: Ultra-fresh air and high humidification intensity meet the deep moisturizing needs of the skin. Small and portable, suitable for cars, homes, offices, bedrooms and other places. Gift Choice: Portable Home, Office, Gym, Yoga, or Nursery. Perfect gift for family and friends who hate dry air.