Donner DL-1 9 LED Music Stand Light Portable Clip On Adjustable Two Levels of Brightness Great for music stands - pianos, orchestra pits, work tables, mixing tables, dark clubs and more Great for reading - iPad, Kindle, tablets and regular books.Light weight high quality material Low power consumption - Offers 20 hours of continuous use on 3x AA Batteries (included). Also Powered by USB (78" Inches extra long USB cable included) and AC/DC Adapter (included) Fully Adjustable - 1 Arm (Goose neck), extra strong clip grips almost anything or use it free standing Two Levels of brightness - 9 Powerful LED Lights, sensor switch require just a tap to change the brightness level and to turn it on/off