Relieve fatigue White noise can relieve travel fatigue, sound auxiliary therapy, no addiction. Wide range of applications, a variety of soothing sound sources to meet the needs of different groups of people. Easy to store and carry Small in size, does not take up space, and is easy to store and carry.No worry at all about not sleeping well while traveling. Suitable for Help you fall asleep through music, lighting methods, which is very convenient.It is also suitable for babies, which can simulate uterine environment and help babies sleep. Improve the quality of sleep The beautiful sound will make you fall asleep peacefully and help you improve the quality of sleep.Creating a healthy home environment that helps you relax your body, de-stress and simplify your life. Easy to use Stylish and light, easy to carry, does not take up space, the operation is simple and convenient, suitable for the whole family. Manual 1. The product has a total of 5 buttons, a switch button (including play / pause function), sync button, light button, previous song (including mute function) and a next song (including the add sound function). 2. A total of 9 sleep aid music (white noise, ocean waves, crickets calls, rain, birds calls, water flow, lullaby 1 lullaby 2 lullaby 3) 3. The light button can work independently and also can work without turning on. 4. Long press for 0.5 seconds to turn on the key, short press to pause playing and listen to a music track after turning on the phone, and the music will loop continuously. Press up and down to switch, long press to increase or decrease volume, play with memory after power on, what music will also have memory, and music from last power off will play automatically the next time it is turned on. 5. Press the light button to divide into 6 cycles, from 10 minutes to 0 as a cycle, the countdown starts at 10 minutes, and the breathing rate gradually slows down from 10 minutes. The light is on to breathe in, the light is dim to breathe out, and the breath is guided. This function is automatically deactivated for 1 hour. If the stopwatch function is not on, it will be at the stopwatch time if the stopwatch function is on. 6. The timing is divided into 15 minutes (bright red LED), 30 minutes (bright green LED), 60 minutes (bright blue LED), short press to change and turn off the timing for the fourth time. They are respectively indicated by LED indicators.