EarPollution Nerve Pipe Headphones - Butterfly-Pink/Chrome (EP-NP-1220) (Discontinued by Manufacturer) Fashioned with extra-large speaker drivers, Nerve Pipes deliver deep bass, smooth highs, and crystal clear vocals. Lightweight and ergonomically designed, Nerve Pipes have rotational cups to fit your head. Nerve Pipes 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 Driver Unit: 40mm Impedance: 32 ohms Sensitivity: 120dB+/-3dB at 1 KHz Frequency Response: 30Hz to 20 KHz Cord Length: 1.2M