The light arms are made of quality metal alloy material with high flexibility and hardness, allowing them to be positioned and adjusted to the required angle and shape, providing a full range of multi-angle lighting options. Multiple Power Supply Modes: These book lights are suitable for nighttime reading and offer multiple power supply options, including AAA batteries or USB cable. When connected to a DC plug, the power source switches automatically to USB power without needing to remove the batteries. When disconnected from the plug, the device reverts to battery power. Simply press the button to turn on. Batteries (three AAA) are not included. Meet Your Multiple Needs: The LED lights on these battery-operated clip-on lights provide brightness equivalent to three standard LED lights. The switches on the dual arms allow for various lighting configurations: one light on a single arm, both lights on a single arm, or all lights on both arms. The lights are flicker-free and shadow-free, designed for comfortable reading and meeting various lighting needs. Adjustable Clips: These rechargeable night lights feature adjustable clips that can securely grip objects of varying thickness. A small independent rotating part on the clip tail increases the clamping range and ensures a firm hold on different surfaces. Wide Range of Uses: These rechargeable book lights are ideal for use on music stands, for reading, piano performance, orchestra, music performances, worktables, computers, knitting, sewing, and crafts. They are practical, versatile, and portable, suitable for travel or nighttime reading. Color: Black Material: ABS + Metal Package Contents: 2 x Music Stand Lamp Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations between the color of the item in the image and the actual product. Measurement error is permitted within +/- 1-3 cm.