The color temperature of the desk lamp can be selected in 5 steps from 3000k to 6000k. The amount of light can be adjusted in 10 steps for each mode using a slider. The desk lamp has a memory function and remembers the previous color temperature and brightness. A USB power adapter is also included so you can use it right away. (There is no manual, so please refer to the photos.) There is some slight wear and tear, so please refrain from purchasing if you are sensitive to this. Base Material: Aluminum Item Weight: Approximately 0.62 kilograms Shade Material: Plastic Switch Type: Touch