3.5 mm stereo plug 
Max. Output:100 mW 
Sensitivity: 103 dB±3 dB 
Rated impedance:32 ohm 
Frequency response: 20 Hz-20 kHz 
packing size: 21.5x10x23.5cm  

-Full metal design 
- Adjustable sound by rotating the housing 
- 50mm driver-giving you plenty both bass and high resolution. 
-Hi-end PU earpad-comfortable wearing experence 
- Hi-quality TPE/fabric cable(with Kevlar in it*optional) 
-Good bass provided 
- Best for PC, personal stereo, MP3 player,radio and mini stereo systems 
-Color:Varies depending on customer's choosing