The light arms are made of metal alloy with high flexibility and hardness, allowing them to be positioned and adjusted to any desired angle or shape for optimal lighting. Multiple Power Supply Options: This book light supports both AAA batteries and USB power supply. When connected to a DC power source via the USB cable, the device automatically switches to external power and disables battery usage—no need to remove batteries. When disconnected from external power, it seamlessly reverts to battery operation with a single button press. Batteries (AAA, three required) are not included. Brightness and Controls: The LED lights deliver brightness equivalent to three standard LEDs. Independent switches on each arm allow multiple lighting configurations: one arm on, both arms on, both lights on a single arm, or all lights on both arms. The lighting is flicker-free, shadow-free, and glare-free—designed specifically for comfortable reading. Adjustable Clip Design: The clip features an adjustable mechanism with a rotating component at the tail, enabling secure attachment to objects of varying thicknesses. Versatile Use: Ideal for music stands, reading, piano practice, orchestral performances, desks, computers, knitting, sewing, and crafting. Compact and portable, suitable for travel or nighttime reading in bed. Color: Black Material: ABS + Metal Package Contents: 10 x Music Stand Lamps Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-QHuang Store 1