White noise on the go: Portable sound machine with 20 kinds of the most soothing white noise can carry everywhere. Sounds including: White Noise, Hush, Heartbeat, Ocean and more. USB charging port for worry-free charging anytime: With a minimum 15-hour ultra-long battery life, it ensures uninterrupted use throughout the night, acting as your most reliable sleep companion,and usb-c is also included. Timer function: Start the timer function according to the manual, and it can be automatically turned off after you or your baby are asleep to create a more comfortable sleeping environment. Help baby fall asleep at any time: This product can help your baby fall asleep at any time. It does not require any app, wifi, or bluetooth. Professional design: The mini body seamlessly integrates into the bedroom aesthetics, only the size of the palm of the hand can release a professional-grade sound field, built-in ASMR-level white noise algorithm, 30 seconds to guide the brain into relaxation mode, scientifically shorten the time to fall asleep by 45%. In addition, a variety of colors are available.