Description Adjustable Brightness Color: There are 4 lighting modes for the reading lamp: Bright/dim white and bright/dim yellow. The desk lamp meets your needs for daily reading, office, children studying webcam lighting and other scenes. Flexible Durable: The 38 cm gooseneck of the reading lamp can be rotated 360° to provide flexible lighting. The clip is attached with foam rubber, which protects your furniture from scratches. The maximum width of the clip is 5.8 cm. Eye-friendly Reading Lights for Books in Bed: Made of 36 LED lamp beads, the illumination of the clip-on lamp does not flicker. You can attach the LED ring light to the headboard, computer, desk, piano, etc. USB Powered: Comes with 150 cm USB cable, the clip lamp is convenient to connect to computer, AC adapter or power bank (AC adapter NOT INCLUDED). Note: This bedside lamp is not powered by an electrical outlet. Energy-saving ring lamp: The clamp lamp has a wider illumination area and higher brightness than the small book lamp. The LED light source has higher performance and longer service life.