B006QR8W6K Koss Porta Pro KTC Ultimate Portable Headphone for iPod, iPhone and iPad

Ultimate sound and comfort for music lovers. Connectivity Technology: Wired
KTC – remote and microphone control features made for iPod, iPhone, and iPod
Adjustable Headband for maximum comfort
Collapsible design for convenient storage, includes carrying case.
Frequency response 15-25,000Hz, 101db SPL sensitivity, 3.5 mm plug