mk5 Isolator earphone Isolator earphones for today's active lifestyles-tune out the world around you, so you can hear every detail in your music. Ideal for commuting, travel and sports activities. Low-profile, 6mm neodymium moving Coil drivers fit comfortably with hats and helmets 35-42 dB of noise isolation lowers the risk of listening at unsafe levels Reinforced 4 ft. cable and 3.5 mm stereo jack