SIX NATURE SOUNDS: Nature sounds help provide a relaxing experience and a good night’s sleep by blocking out noises. This sound machine includes six nature sounds: white noise, thunder, ocean, rain, summer night and brook NATURAL SLEEPING AID: White noise machines help create a soothing environment, and cover unwanted noises around you so you can fall asleep and stay asleep throughout the night. This machine is great for adults and babies PORTABLE & CONVENIENT: The sound machine is lightweight and portable and can fit in any suitcase so you’ll never have to worry about losing sleep while you travel. This machine is battery or adaptor operated AUTO-OFF TIMER: You can set a timer that will turn the machine off. The auto off time includes three options: 15, 30, or 60 minutes HOMEDICS: HoMedics is about creating a healthy home environment that helps you relax your body, de stress, and simplify your life