- Color: Black + red  - Plug type: USB 2.0  - High stereo sound performance  - Noise Canceling  - Speaker Diameter: 40mm   - Speaker Impedance: 32ohms  - Speaker Frequency Response: 20HZ-20KHZ  - Speaker Sensitivity: 115dB±3%  - Rated power output: 41mW  - Maximum output power: 84mW  - Noise level: </=-78dBA  - Dynamic range: >/=78dBA  - THD: </=0.1%  - Stereo crosstalk: </=-52dBA  - MIC sensitivity: -52dB  - Directional microphone: noise canceling  - MIC impedance: </=2.2K ohms  - MIC frequency response: 50Hz~15KHz  - Cable Length: 2.0M<img src="http://112.74.112.28/down/products/416790/416790_000.jpg">