30 continuous nature sounds: The ultimate solution for a restful sleep. The baby audio machine has 30 continuous nature sounds (6 types with 5 variations each), including white noise, pink noise, brown noise, fan, womb, ocean, rain, running water, storm, forest, and also has adjustable volume . You can immerse yourself in a relaxing environment that will help you fall asleep faster and stay asleep longer. 16 Night Lights with Adjustable Brightness: By pressing the touch panel on the top of the white noise machine, you can adjust the brightness of 16 different lights and switch between breathing light and constant light. This ensures the right lighting for night care. Timer and memory functions: The Ponjel sleep machine has 3 different timer options (30 minutes, 60 minutes and continuous play) that stops automatically. You can also play all night long. For convenience, the device also remembers the last timer setting. 3.5mm Headphone Jack: Adults use a 3.5mm jack for white noise. You can use your own 3.5mm earbuds to connect to a portable speaker when trying not to disturb others in the library or while sleeping, allowing you to immerse yourself in a relaxing environment without others disturb. What includes: 1 Sleeper, 1 USB Cable, 1 User Manual, 18 Months Warranty, Lifetime Customer Service. Note: This white noise machine requires a 5V USB charger (not included) and cannot be used wirelessly.