EarPollution EP-NP-4220 Nerve Pipe Headphones - Hazard Chrome/Black (Discontinued by Manufacturer) Fashioned with extra-large speaker drivers, NervePipes deliver deep bass, smooth highs, and crystal clear vocals. Lightweight and ergonomically designed, NervePipes have rotational cups to fit your head. NervePipes fold up for convenient travel use. Compatible with iPhone, iPod, BlackBerry, and any other media device with a 3.5 mm jack. Driver Unit: 40mm neodymium - Impedance: 32 ohms - Sensitivity: 120dB+/-3dB at 1KHz - Frequency Response: 30 Hz to 20 kHz - Cord Length: 1.2 meters