9 LED provides powerful lighting, suitable for lighting music score to play the piano or other user musical inst ent. 2 ways to power: battery setting or plug the USB cable. 360 degrees flexible to fit different states. Clips base the lamp firmly fixed the lamp, save space and keep the lamp safe. Protective piece on the mouth clip can actually avoid abrasion on things like pound. Switch on the top of the lamp can adjust the light levels to meet your different needs. LED: 9 Battery (not included): 3 * AA, DC 3.2-5V Brightness: 9 * 9LM Color temperature: 6000-6500K Rated Power: 0.9W Color : Black Material: Plastic Item Size: 20.8 * 9.4 * 29.0cm / 1.7 * 3.1 * 9.1in (L * W * H) List of packages: 1 * musical score lamp 1 * USB power cable Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.