Adopting electret condenser cartridge with high sensitivity , low impedance , anti noise and anti jamming capability , | Aftermarket microphone works with most car radios with 3.5mm Mic input. | With fast and accurate data transmission, which could guarantee the voice clearly and stably under kinds driving occasions, | Includes Dash Mount & Visor Clip. | Wire Length 3 M (9 Feet) | Plug microphone into MIC port on back of unit, DO NOT plug into AUX port on front of unit.