Features.

Audiophile quality close-ear, dynamic stereo headphone.
Powerful neodymium-ferrous rare earth element magnet system.
Lightweight copper-clad aluminum voice coil.
Transparent full-frequency reproduction offers fatigue-free musical enjoyment.
Large surface radial diaphragm driver unit for clear, high quality sound reproduction.
Adjustable frame allows the best wearing comfort.
Flexible ear-flap design ensures comfortable fix.
Coiled cord permits extended length of 3 m. The cord is terminated with a gold-plated mini stereo phone plug, and with the included gold-plated 1/4" phone adaptor plug is compatible with any audio device.
Super Thin 40 mm diaphragm driver with neodymium magnet offers wide dynamic range and frequency response.
Specification.

Drive unit: Super Thin 40mm Diaphragm Drives with Neodymium Magnet
Frequency response: 20~20,000Hz
Impedance: 64
Sensitivity: 104 3 dB /mW at 1,000Hz
Input connector: Gold-Plated Mini Stereo Phone Plug and 1/4" Phone Adaptor
Power handling capacity: 1W
Net weight: 385 grams (13.58 oz)