The light arms are made of high-quality metal alloy with high flexibility and durability, allowing them to be positioned and angled as needed for optimal lighting. Multiple Power Supply Options: This book light supports AAA batteries or USB power. When connected to a USB power source, the device automatically switches from battery to external power without removing the batteries. When disconnected, it seamlessly reverts to battery power with a single button press. Batteries are not included. Brightness and Controls: Features bright, flicker-free LED lighting equivalent to three standard LEDs. Independent switches on each arm allow multiple lighting configurations: one arm only, both arms, or all lights simultaneously—ideal for reading with no glare or shadows. Adjustable Clip Design: The clip adjusts to fit various thicknesses. A rotating mechanism at the clip’s base enhances grip strength and stability on different surfaces. Versatile Use: Suitable for music stands, books, pianos, orchestras, desks, computers, knitting, sewing, crafts, travel, and bedtime reading. Color: Black Material: ABS + Metal Package Includes: 2 x Music Stand Lamps Note: Actual product color may vary slightly due to screen settings and lighting conditions. Measurements are approximate.