The USB Clamp Lamp attaches almost anywhere and uses any USB ports to power! The wide mouth clamp clamps on desks bookcases bedframes and much more. The 12-inch bendable gooseneck arm allows you to focus light where you want it. Plug it into your computer for extra light while studying. Plug it into a power bank and have light anywhere. This even works in cars with USB ports perfect for reading! The 4.5 foot cord reaches most places and the in line on/off switch adds convenience.