The Daffodil LEC150W is a LED light that can be plugged into your computer"s USB port or coupled with a USB adapter (not included), can be powered by the mains meaning it"s equally comfortable at home on your bedside table for reading as it is on your computer desk lighting your keyboard.A sturdy base with a pop-up switch will allow you to turn the light on in the darkest of rooms and a study flexible neck allows you to position the light to your preference.