LectroSound uses custom-designed analog circuitry to generate warm, robust non-looping white noise thats truly random. Whether you need it for sound masking in professional environments, youd like to improve your focus and concentration, or you just need help getting to sleep more quickly and enjoying more restful sleep, LectroSound is a simple solution that works. The tone dial provides precise control of the sounds warmth across a spectrum of brown and pink variations. You can also adjust the output with the volume control to match the needs of your environment. And, its compact for travel, whether you want to go across the room or across the country. It connects to any USB power source, and includes a USB-to-AC adapter for using with wall outlets.

Adaptive Sound Technologies LectroSound Noise Machine for Sleep and Relaxation with Power Adapter - White (Renewed)