Power your music stand light with 3 AA batteries (not included) or via USB (USB cable included). Enjoy wireless reading. Ideal for use with music stands, books, phones, tablets, orchestras, worktables, craft tables, and computers. Features: - Material: ABS, electronic components, iron - Size: 53.50 x 5.50 x 5.50 cm / 21.03 x 2.16 x 2.16 in - Light source: 28 LED lamp beads - Requires 3 AA batteries (not included) - LED light with timing function - Portable design for use in orchestra, at work, crafting, on tables, and while traveling - Flexible rotating head allows precise light adjustment - Large clamp provides secure and stable attachment to music stands - Three brightness levels controlled by touch power switch Package list: 1 x Music Stand Lamp 1 x USB Cable