LED Piano Orchestra Lamp - Usb, Battery, Ac Adapter Powered - Black Flexible Clip-on Clip-on LED Orchestra Light / Piano Lamp 3 Power Options: three AA batteries AC Adapter (wall plug), or USB Cable (included) 2 Brightness Settings and Flexible Gooseneck Allows for Precise Light Adjustment Clip is lined with rubber for protected and secured attachment Back Shade shields audience from light