??2.5mm Hands Free Bluetooth External Mic Microphone for Car Pioneer Stereos Radio Receiver<br /><br />Specifications:<br /><br />1.Compatible for :Pioneer<br />2.Plug: 2.5mm connector<br />3.Sensitivity:-30dB+\/-2dB<br />4.Wire Length: 4 M (13.1ft)<br />5.Frequency Range: 50Hz-20KHz<br />6.Operation Voltage: 1.0V-10V DC<br />7.Standard Operation Voltage: 4.5V<br />8.Output Impedance: &amp;le;2.2 k&amp;Omega;    <br />9.SNR: &amp;gt;58dB<br />10.Polar Pattern: Omni directional Mic diameter's 9.7 X 4.5mm<br /><br />Package Inculded:<br /><br />1 X Microphone