Pack of 2 360&deg;rotation Portable USB 13 LED Flexible Swivel Light Lamp for Laptop PC Notebook PC ,led Reading/computer Keyboard/work Light-no Batteries Needed By Yueton(blue and Black) High quality Bright 13 LED ,Plug and Play. USB bus powered ,no external adapter or batteries needed. Small enough ,easy to carry and won't take up much space in your laptop case. Gently adjust the flexible stainless steel neck of USB LED light to position the fly light anyway you wish. Great for the notebook traveler.