Ecotones Duet is the first sound machine designed from the ground up to help people relax and sleep soundly. The Ecotones Duet uses a new generation of Adaptive Sound Technology to neutralize an even wider range of disruptive background noises. It includes 10 natural, ultra-high quality sounds, and also adds features for personalizing the sounds to your preferences. Designed specifically to help improve sleep and relaxation, it also features easy tactile buttons and display lighting controls for use in the dark, while the device itself is small enough to fit on most any nightstand without compromising the high-quality audio and speakers inside.

It retails for $149.95, and you can learn more about the Duet at http://www.ecotones.com/product-duet.php