Lighting for Table Desk Reading Clip-on USB 3-led User Light Lamp USB bus powered, no external adapter or batteries needed Plug and Play Small enough to take anywhere, it fits into your case as easily as it fits your lifestyle For use with any USB compatible computer ( any version ) Flexible stainless steel neck lets you position it any way you like Just plug it in USB port and it will light up immediately Very good for using in dark without disturbing your roommates