Leadleds 6-LED Battery Operated Book Light with Flexible Gooseneck Neck for Portable Reading Light Music Stand Lights ( Black ) The led reading light powered by USB port, available works by AC plug or 3pcs AAA batteries(batteries non-include) Features an ON/OFF button, you don't have to upplug every time, flexible neck can be bent to direct light just where you want it Gooseneck length: 11 inches, total length: 16 inches Humanization design, 6-LED luminescence white light suit for eye protection Great illuminating in bedroom, living room, reading room, study, working, music stand, piano etc