CAD ACTIVE NOISE CANCLNG PROFESSIONAL HEADPHONES High-output 9mm driver with neodymium magnet Great for travel and noisy environments Includes 1/8" mini stereo plug, 1/4" stereo plug, airline adapter, 3 sizes of earbuds CAD NB-2 earphones use a high-output 9mm driver with a neodymium magnet for clear, robust audio They're great for travel and listening to music in challenging sound environments