Description: This is an optional external microphone for select Car Radio head units with built-inbluetooth that feature a 3.5mm microphone input. The microphone can also be used withexternal bluetooth interface module. The Mic will provide better performance in noisy environments. Feature: Adopting electret condenser cartridge with high sensitivity, low impedance, anti noise & ant jamming capability, with fast & accurate data transmission, which could guarantee the voice clearly & stably under kinds drivingoccasions, its highly enhanced the speech quality of hand free car kit communication system. Specification: Polar pattern: Omni directional 3.5mm connector Sensitivity: -34DBFrequency Range: 50 Hz-20 K Hz Output Impedance: 2.2 k SNR: 60d B Standard Operation Voltage: 5 V Operation Voltage: 1.0V-10V.DCWire Length: 3 m (9.84ft) Installation: Install the microphone in a position & orientation that will enable it to pick up the voice of theperson operating the system. The microphone features an attached 9.84ft cable with a right-anglemale 3.5mm connector which plugs into the microphone input on the rear of your compatible car radio. The microphone comes supplied with a mounting clip which means that you can clip the microphone to yourvisor or mount it to a clean, flat surface using the supplied two-sided tape. Once mounted the, the mountingclip means that you can adjust the angle of the microphone up or down for better coverage in your vehicle. Package Included:1 X Car Stereo bluetooth Microhone 1