Specifications:

Driver Unit:30mm
Microphone sensitivity:-54dB+ 2dB
Speaker　Impedance:32ohm+15%
Speaker Sensitivity :105dB+3dB
Speaker Frequency Response:20-20,000Hz
Maximum Power Input: 100mw
Cord Length:2-meters

Features:

Closed, supra-aural mini headphones with NoiseGard? active
noise compensation when used in conjunction with special audio jacks
Ultra-lightweight and silm design
High-resolution sound
transportation and storage
Small dimensions