Love this sound machine!! I got this for my grandson who sleeps over on occasion.  It helps him to sleep peacefully without awakening during the night.  The 6 different sounds are crisp and clear and very much authentic. I use the wave sound for him which I love.  Great product! Small enough to be portable yet loud enough to get the job done. This machine offers several optional timers.  Totally recommend this sound machine! :)) [This review was collected as part of a promotion.]