Super Bright 3 LED Swivel Clip Reading Light for Notebook 3 Super Bright LED Lights; 4.2 cm diameter light for night time or any dark lighting Flexible & Swivel; Lifespan of about 50,000 hours; Clips onto any surface, perfect for clipping onto a laptop screen when plugged into the USB USB Cable around 150 cm (4.92 ft.), Extra long reach to put anywhere in the room Great for reading books or magazines at bed time or seeing your keyboards keys when typing in the dark Not battery powered so no need to keep buying batteries! Plug and Play for super easy use, ready to go out of the box!