3.5mm Car External Microphone Mic Car External Microphone Mic is an optional external microphone for selecting Boss Audio System in-dash headunit with built-in Bluetooth that feature a 3.5mm microphone input. The microphone can be used with external Bluetooth interface module. This 3.5mm Car External Microphone Mic will provide you a better performance in noisy environments. Features: - 3.5mm standard plug, plug and play. - 2m length cable long distance transmission. - New revamped design gives you better quality sound during transmission. - Microphone can be picked up from the pedestal for the best sound effect. - Microphone can be glued to the wall, glass, car, door, etc. - Adopting electret condenser cartridge with high sensitivity , low impedance , anti-noise and ant jamming capability. - With fast and accurate data transmission, guarantee the voice clearly and stably under kinds driving occasions. - Highly improved the speech quality of hand free car kit communication system. - Easy to install with double sided tape and mount and reliable to use.