The light arms are made of high-quality metal alloy with excellent flexibility and hardness, allowing them to be positioned and adjusted to any required angle or shape, providing a wide range of multi-angle lighting options. Multiple Power Supply Options: These reading lights offer multiple power sources, including AAA batteries or USB cable. When connected to a DC power source, the light automatically switches to USB power while cutting off battery power without needing to remove the batteries. When disconnected from USB, the light reverts to battery powersimply press the button again to turn it on. Batteries (three AAA, not included). Meets Various Lighting Needs: The LED lights on these battery-operated clip-on lights are as bright as three standard LEDs. Independent switches on each arm allow for multiple lighting combinations: one arm on, both arms on, one side on a single arm, or all lights on both arms. Flicker-free and shadow-free illumination ideal for reading, meeting a variety of user needs. Adjustable Clips: Featuring adjustable clips that securely hold objects of varying thicknesses. A small rotating component on the clip tail allows independent movement, expanding the range of clamping and ensuring a firm grip. Wide Range of Uses: These rechargeable book lights are ideal for use on music stands, for reading in bed, piano playing, orchestral performances, workbenches, computers, knitting, sewing, and crafts. Compact and practical, they are perfect for travel or nighttime reading. Color: Black Material: ABS + Metal Package Contents: 2 x Music Stand Lamp Note: Only the items listed above are included. Other accessories shown in images are not part of the package. Note: Lighting and display differences may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.