LED provides powerful illumination, suitable for music score lighting for piano or other musical instrument user. 2 power supply ways: battery power or plug in USB cable. 360 degree flexible to adapt to different state. Clips base of the lamp firmly fixed the lamp, saving space and keeping the lamp safety. Protective piece on the clip mouth can effectively avoid abrasion on things like book. Switch on the top of the lamp can adjust the levels to meet your different needs. LED: 9 Battery (not included): 3 * AA, DC 3.2-5V Brightness: 9 * 9LM Color temperature: 6000-6500K Power: 0.9W Color: Black Material: Plastic Item size: 20.8 * 9.4 * 29.0cm / 1.7 * 3.1 * 9.1in (L * W * H) Package list: 2 * Music Score Lamp 2 * USB Power Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.