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 for reading at night in bed offer multiple power supply options, including AAA batteries or USB cable. When connected to a power source via DC plug, the battery is automatically disabled without needing removal. When disconnected from the power source, the battery resumes operation; simply press the button again to activate. 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. Independent switches on each arm allow various lighting combinations: one arm on, both arms on, one side only, or all lights on, delivering flicker-free, shadow-free illumination ideal for reading and other tasks. Adjustable Clips: These rechargeable night lights feature adjustable clips that can securely grip objects of varying thicknesses. A small rotating part on the clip tail allows independent adjustment, expanding the range of compatible surfaces and ensuring a firm hold. Wide Range of Uses: These rechargeable book lights are suitable for music stands, reading, piano performances, orchestras, workbenches, computers, knitting, sewing, and crafting. Their practical and versatile design makes them ideal for travel or nighttime reading. Color: Black Material: ABS + Metal Package Contents: 2 x Music Score 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 allowance is +/- 1-3 cm.