Pro Music Kit: Music Stand Light (Satin Finish). With AC Adapter & 6ft USB Cable Four Extra-Bright, Energy-Efficient LEDs - and LEDs Last up to 100,000 Hours Flexible Goosenecks Put Light Exactly Where Needed. Engineered Lens Distributes Light Precisely. Individual Light Switch on Each Head - with Two Light Levels Per Head, for Total Control Any Questions? Call us on (954) 573-2137 Powered by Batteries (not included) or Mains USB Plug (included) - with Extra Long Cable (6ft, 6 in) for Convenient Mains Power