Type: Open Air Dynamic (50mm speaker)
Sound Pressure Sensitivity:  105dB +- 3dB (1000Hz/mw) 
Frequency Response: 18Hz~22 KHz
Impedance: 32Ω +- 10% (Dc)
Microphone Sensitivity:  -52dB +- 3dB
Rate Input: 20mW
Max Input:  50mW
Plug Size:  3.5mm Stereo Plug*2
Cord Length:  2.3m+- 50mm 
Features >> 
1. Soft and comfortable sponge headband. 
2. Super Size speaker design is to effectively expand frequency response. 
3. Appealing modern appearance.
4. Retractive Design.