Mighty Bright Double Flex Gooseneck LED Clip-on Light - 2 LED Each Arm Mighty Bright DoubleFlex LED Book Light has two fully adjustable goose necks that cast light evenly over two pages. Each head has a Super Bright LED and Might Bright's proprietary sensor switch. The flexible necks allow you to position your lighting anywhere you want it! Dual flexible arms. Two LED lights with separate switches, perfect for large textbooks Extra strong clip grips almost anything, or use free standing as a task light Flexible neck length: 195mm Powered by 3 AAA batteries (Not included)