Masks Noise - cancel out noises that might disturb or distract, for improved sleep and concentration.</br>3 Sound Options - Bright white noise, deep white noise and gentle surf.</br>Portable - Perfect for travel and on-the-go use (includes lanyard for easy handling or hanging). </br>Rechargeable - Convenient USB charging (USB cable included).</br>Guarantee - Backed by a one-year limited factory warranty and the always exceptional Marpac customer service promise.</br></br>Product Description</br></br>From Marpac, makers of the beloved Dohm-DS All-Natural White Noise Sound Machine, comes Rohm, a portable electronic sound machine suitable for travel or on-the-go use. This compact portable unit is designed to mask noises anywhere, at any time. Rohm creates a soothing, consistent sound environment for sleep, privacy, or concentration. Night or day, wherever you may be, Rohm lets you take control of your sound environment – so you can live (or sleep) your very best life, uninterrupted.</br><br/>http://www.amazon.com/gp/product/B01D50RZQI