Block out disruptive noises for better sleep or concentration wherever you are with the Rohm White Noise Machine. USB-rechargeable and perfect for on-the-go use, the Rohm lets you take control of your sound environment anywhere. At just 3.8 ounces, it easily fits in any carry-on bag, or backpack and includes a lanyard for convenient hanging. Features: 3 Sounds: Bright White Noise, Deep White Noise, Gentle Surf Volume Control USB-Rechargeable Includes Lanyard, USB rechargeable cord, USB Power adapter not included This sound machine is intended for portable use and must be turned off and unplugged every 14 days