Our sound machine has 6 groups of audio, each group has 5 kinds of sound scene classes can be switched, which provides 30 levels of volume level free adjustment. The noise machine has 30 high-fidelity soothing sounds such as white noise, pink noise, brown noise, rain, running water, fan, tire, lullaby, fire, ocean waves, birdsong, etc. They are great as gifts for family, kids or friends for birthdays, Thanksgiving, Halloween, Christmas and other holidays. 3 Timers and Memory Function: STYFSCP white noise machine can be set to play continuously all night or 30,60 minutes with automatic shutdown timer, you can set it according to your needs. As the timer closes, the sound fades out and then turns off. In addition, the noise machine has a memory function and a headphone jack, it automatically restores the volume, sound and timer settings played when it was last turned off, so you don't need to readjust. USB Adapter and Portable: This sound machine comes with a 5V/1A AC adapter and a 1.5m USB power cable, plug it in and you can play the sound, no extra purchase required. The noise machine is made of high quality ABS material, strong and durable. It is very light and easy to carry, only 0.45 lbs and the size is 4.3*4.3*2.5 inches. So whether it is at home, office or travel, it is the perfect choice, allowing you to enjoy the comfort and relaxation of the noise machine anytime, anywhere. Flexible Buttons and Night Light: Our white noise machine has 2 lights and 5 buttons which can be turned on by long press for 3 seconds. You can single click turn on/off and switch the light mode (breathing/constant light), which long press to adjust the light brightness level. Soft night lights make it easy to find things in the dark and create a warm, comfortable environment that helps you fall asleep faster and easier. It is very good for mom to feed her newborn and change diapers at night. Risk-free Purchase and Package Includes: The sound machine has passed FCC, CE, RoHS certification, so there is no need to worry about product safety. We provide 90 days free replacement product and 2 years assurance. Please feel free to contact us if has any problem, we will solve it for you within 12 hours. Package Includes: 1*white noise machine, 1*AC adapter(5V/1A), 1*USB power cable and 1*user manual.