High End usb  headphones,headsets,earphones

1,Plug Model : 2.0 USB/3.5mm
2,Speaker/Vibration diameter : 40/30mm              
3,Speaker/ibration Impedance :32/8Ω                
4,Speaker Frequency response: 20Hz - 20KHz      
5,Speaker Sensitivity: 110dB           
6,Noise Level :≤-78dBA
7,Dynamic range: ≥78 dBA
8,THD :≤0.1%
9,Stereo crosstalk :≤-52 dBA
10,Microphone Specification 6*5mm                  
11,Microphone Sensitivity : -58dB               
12,Microphone Directivity : Omni directional
13,Microphone Impedance ≤2.2KΩ            
14,Microphone Frequency response : 50Hz - 15KHz
15,Headphone Wire Length:2.2M