CAD NB-2s are compatible with Blackberry, iPhone, MP3 players, and any other portable music-listening device. CAD includes an 1/8" mini stereo plug, 1/4" stereo plug, and airline adapter, and 3 different sizes of earbuds for precision fit and maximum performance with the NB-2 earphones. A storage gig bag and battery are also included. CAD NB2 Noise-Canceling Earphones Features: 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