Phiaton Bridge MS 500 M-Series Headphones with Microphone Passive noise Isolating ear pads provide hours of comfortable listening Dual Chamber structure and Multi-Tune Acoustic Design optimizes airflow producing authentic sound reproduction Include two tangle-free, oxygen free copper cloth wrapped cables, one with an in-line microphone Include two tangle-free, oxygen free copper cloth wrapped cables, one with an in-line microphone Easy fold-able structure and carrying case allows for convenient transportation