Brookstone’s amazing sound gadget for sleep uses 5 nature soundscapes and 7 clinically designed sounds – a project of the Center of Neuroacoustic Research. Choose 90, 60 or 30-minute auto shut off and lie back for a sound night’s sleep. Tranquil Moments represents more than 20 years of research and development into using sound to heal and positively change states of consciousness. It’s the result of medical studies and hard work with many patients. It’s a natural sleep aid which will help you achieve deeper states of sleep, revitalization and total relaxation.