This great light clips onto any book, music stand, or just about anything else! * Two lighting heads each contains two large LED lights with four different light level options * Fully adjustable arms allow the lights to be positioned in almost any angle. Slim design for easy storing and carrying. * Powered by USB cable, AC adapter (110-220 volts) or 3 AAA batteries (not included) * Size: 30 x 4.5 cm / 12 x 1.8 inch