The AVANTEK White Noise Machine Pro comes with 20 soothing sounds: 6 types of white noise, 6 fan sounds, 8 nature sounds including ocean waves, rain, wind, stream, birds, cricket, campfire and clock. All the sounds played by this machine are crisp, natural, realistic, and free of scratches, which helps you block out distractions, creating an environment ideal for sleep, relaxation and concentration on study or work. With a built-in 3.5 mm headphone jack, you can listen privately without disturbing others, making it ideal for public places like libraries, airplanes and more.