The NB1B are high quality, noise isolating earphones with enhanced base performance designed for everyday use for portable music listening devices. They use a high output 8.5mm driver with neodymium magnet for clear, robust audio from personal audio players. Enhanced bass performance with up to 3X the bass of most earphones. Includes three sizes of earbuds made of durable soft-silicone easily fitting many ear shapes and sizes while isolating the ear canal from outside noises. 1/8" stereo plug, 1/4" stereo plug, airline adapter and nylon storage case included.