Lightahead Clip On Eye Friendly Desk Lamp USB Powered Dimmable Touch Control Desk Lamp Gooseneck with USB Charging Port and 3 Levels of Smart Touch Adjustable Brightness (Purple) Easy to use. Sturdy clip acts as a stable base, allowing the light to stand on its own, as well as attach to a book, shelf, cupboard, or computer. Portable can be carried Easy to use. The gooseneck Flexibility gives the LED Book Light the capability of bending in virtually in every direction while the clip firmly affixes to pages. Dimmable through touch sensor switch Three adjustable brightness levels to suit every hour of the night. Simply tap the power repeatedly until you reach your desired level. Sturdy clip acts as a stable base, allowing the light to stand on its own. It can also be used as a clip on light for bed, laptop, computer, headboard, book, shelf, music stand, cupboard, etc.