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 reading lights offer multiple power supply options, including AAA batteries or USB cable. When connected to a DC plug, the power source switches automatically to external power while the battery is disconnected without needing removal. Upon disconnecting from the plug, the device reverts to battery power. Simply press the button to operate. 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 LEDs. The dual-arm design allows independent control: light on one arm, both arms, or all lights simultaneously. Flicker-free and shadow-free illumination ensures comfortable reading performance. Adjustable Clips: Featuring adjustable clips that securely grip objects of varying thickness. A small rotating part on the clip tail enhances clamping range and stability, ensuring a firm hold on different surfaces. Wide Applications: These book lights are ideal for use on music stands, for reading, piano playing, orchestra performances, workbenches, computers, knitting, sewing, crafts, travel, and nighttime reading. Practical and versatile for everyday use. Color: Black Material: ABS + Metal Package Contents: 2 x Music Stand Lamps Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.