Suitable for compatible with multiple containers: Our portable bedroom quiet humidifier is adjustable in length, so it can be combined with different containers. For example, mugs, ordinary glass bottles or mineral water bottles, there is no water tank, thus breaking the inherent container limitations. Note: This product does not include water bottles. Quiet and easy to operate: With the latest ultrasonic technology, mini portable humidifier can achieve lower power (1.5 watts) and quiet. The operation noise of this ultrasonic cool mist humidifier is less than 30dB, which will not disturb your rest even at night. Easily use this desk-mounted office humidifier with just one button. USB port and auto shut-off: Our humidifier comes with a small car humidifier with a USB port, so it can work anywhere you plug in a USB, and the handheld car humidifier can turn off automatically after 8 hours, so you don't need to worry about it after sleeping. Easy to carry, wide application: Small size (detachable design), easy to carry around. Just plug in the USB, you can use it anytime and anywhere, more convenient This bedroom quiet humidifier can be competent in a variety of scenarios, whether it's for business, travel, driving, working or sleeping. Best Choice: Can be used at home, office, gym, yoga or nursery. The perfect gift for family and friends who hate dry air. If you are not satisfied with our mini portable humidifier for any reason, please contact us. We will deal with your problem promptly and give you a pleasant shopping experience.