Description: The USB mini microphone is of 360-dergree omnidirectional, which can receive sound in a long distance. The driver free mic is equipped with USB connector, which is suitable for any types of computer. The mini microphone has high sensitivity,which, compared with the traditional type, greatly enhance the effecitive distance of transmission. The mini recording equipment can prevent from bothering by noise, which provides you with a quiet private space. The mini microphone can be applied for network chat, MSN and other social usage. Specification: Size: 2x1cm. Color: Black. Material: ABS. Impedance: Less than or equal to 2.2k ohm. Sensitivity: -67dB +/- 4dB. Decreased sensitivity: -3dB at 1.5V. Working voltage: 4.5V. Frequency response: 10~16kHz. Signal to noise ratio: More than 67dB. Size_Chart: Note: Package_Includes: 15 set of 1 x Microphone. (Black )