Marpac 580 SleepMate & Sound Screen Conditioner White Noise Sleep Machine The tone and volume of the sound are controlled by simply rotating the "cap" and "collar" of the housing. This "white noise" sound effectively masks unwanted noises and creates a sense of calm, making it easier to concentrate, relax and/or sleep. Encased in a durable plastic housing suitable for travel or use in the home or office. Features: Electro-mechanical durability Excellent sound quality Patented housing design Lightweight and Economical. One year limited warranty Made in the U.S.A. Read what others are saying about this product.

Sleep and rest better- Creates a soft, soothing sound of rushing air that helps mask unwanted noise

Recommended for restless sleepers, shift workers, infants, children, students, apartment dwellers.

Use for Office Privacy - Mask confidential conversations or help workers to concentrate

Single Speed, Patented Housing Design. Lightweight. One Year Limited Warranty. Made in USA