This white noise machine is specially designed for sleeping and relaxation. It not only masks noise, improves sleep quality, but also improve your concentration while you read, work or study; wake up you from a deep sleep.Features:1. 15 kinds of smooth and natural sounds: 5 sounds to sleep: brook, rain, wind, ocean, summer night; 5 sounds to relax: brainwave therapy, forest, meditate, relax, white noise; 5 sounds to rouse: motor, black noise, bird, thunder, ambience, so that you can choose sounds according to your preferences and needs to create a quiet environment.2. Portable design: It takes up a small space on the bedside table and can be easily put into your bag or suitcase, making it the perfect travel companion.3. Not just for sleep: our white noise so.