This USB reading lamp features a gooseneck & light panel with 28 bright lights, On Off toggle switch and measures 16" in length. The power toggle switch is located on the back side of the lamp head. | Design - Use the adjustable flexible gooseneck arm to direct light to your favorite position to light up your keyboard or monitor - Also this led lamp is usb powered so no charging or batteries are required | This USB lamp is compatible with type A USB on your laptop or desk top. It is powered by the USB port plug so it must be connected to a USB port to operate. It is not compatible with Type C USB connectors. | Use - This USB light is great for work, home, travel, vehicle, nightstand, table, bedroom, study or office use on your Mac or PC | Portable - This bendable lamp is lightweight at 2.5 oz and can be folded and carried in a pocket, hand bag or backpack