White noise machine, create a relaxing sleeping atmosphere and a refined listening experience. The sleep sound machine with 30 soothing sounds including: 3 White noises( White noise, Pink noise, Brown noise ) 2 Fan Sounds( Soft Fan, Loud Fan) 15 Nature Sounds( Rain on Yard, Heavy Rain, Rain on Window, Thunder Rain, Stream in the Cave, Brook, River, Gentle Sea Wave, Mightly Sea Wave, Little Sea Wave, Water Drop, Singing Birds, Campfire, Fireplace, Train) 10 Lullabies( Brahms Lullabies, Lullabies, Subote Lullabies, Heart's Beating, Hushing Sound, Paino, Bless Song, Alpha Wave with Dripping, Stars in the Night, Meditation) Specification: Volume Level: 36 levels Brightness Level: 10 Levels Light Colors: 12 Colors Device Working Voltage: DC 5V Item Dimensions: 4.25 x 4.25 x 2.16 inches Product Features: 1. Auto-off 5 Timer Setting: You can set 1hours, 2hours, 3hours, 4hours and continuous play. A great option for a nap. 2. Compact Design: Our white noise machine has a lightweight and compact design that you can easily take anywhere, anytime. 3. DC Port Power By Adapter: With DC port power supply, you will never need to worry about power when using the white noise machine. 4. Memory Function: The sleep sound machine will remember your last melody and volume level after a power outage. No need to reset to your previous settings convenient and easy-to-use design for an enhanced user experience. What's in the box: 1*White Noise Machine, 1*Power Adapter, 1*USB Charging Cable, 1*User Manual