HEALTHY, STEADY SLEEP: instantly mask out disruptive noise. Enjoy quality sleep with sounds that relax your mind. The ultimate sleep comfort.</br>10+ NATURAL SOUND STORIES: Choose from 10+ sound stories taken from natural environments or non-repeating unique fan and white noise sounds.</br>ADAPTIVE SOUND TECHNOLOGY: Patented, innovative technology that adjusts volume automatically based on ambient noise levels in your environment, so you always get the best listening experience in real-time.</br>SLEEP TIMER: Set your Sound+Sleep or Sound+Sleep MINI to poweroff once you have drifted off.</br>SOUND RICHNESS CONTROL: Add layers of audio for a more enhanced, immersive sound profile.</br></br>Product Description</br></br>SOUND+SLEEP Choose from 10 distinct sound profiles, each with two levels of richness to total 30 different sound profiles, all of which have been scientifically engineered to promote a deeper sleep, relaxation, and renewal. Unlike other "white noise" sound machines, SOUND+SLEEP uses magnificent, naturally recorded, high-definition sounds that are up to 30 minutes in length, eliminating all audio repetition for natural real-world sound environments.</br></br>Amazon.com</br></br>SOUND+SLEEP offers 30 distinct sound profiles scientifically engineered to promote a deeper sleep, relaxation and renewal. Unlike other “white noise” sound machines, SOUND+SLEEP uses magnificent, naturally recorded, high-definition sounds that are up to 30 minutes in length, eliminating all audio repetition for natural real-world sound environments.</br><br/>http://www.amazon.com/gp/product/B002SMJQT4