Yogasleep

The Rohm travel sound machine from Yogasleep was designed to mask noises whether you're at home or on-the-go. Rohm effectively cancels out noises that may disturb or distract for improved sleep and concentration. At just 3.5 inches in diameter and 3.8 ounces, the Rohm fits easily in a carry-on bag or backpack and comes with a lanyard for easy handling or hanging. USB-rechargeable (cable included) and operates all night long on a single charge.