BearsFire 360 Degree Adjustable USB LED Flexible Goose Neck Headboard Reading Book Desk Lamp with Clip on Light and On/off Control Switch Small Size for Laptop PC (Black) The maximum product dimensions:L 14.6 x 3.3 in (37 x 8.5 cm). powered by USB cable,Light source: white LED. Features an ON/OFF button, you don't have to upplug every time. Flexible Neck Clip-On Booklight onto your book or lap desk. The energy saving led lamp light use in clip-on or freestanding mode.