Product Features: Provides you better sound quality during transmission, highly improved the speech quality of hand free car kit communication system Adopting electret condenser cartridge with high sensitivity, low impedance, anti noise and anti jamming capability 3m (9 Feet) length cable for long distance transmission, microphone can be picked up from the clip for the best sound effect With fast and accurate data transmission, which can guarantee the voice clearly and stably under kinds driving occasions Adopting humanity design with U shape fixing clip, easy to install and reliable to use. Microphone can be glued with sticker to the wall, glass, car, door, etc Product Specification: Polar pattern: Omni directional 3.5mm Connector Sensitivity: -30dB+/-2dB Frequency Range: 50Hz-20KHz Output Impedance: 2.2 k SNR: >58dB Standard Operation Voltage: 4.5V Operation Voltage: 1.0V-10V.DC Wire Length: 9.84ft Channel:stereo ; mono Package Includes: 1 x 3.5mm Car Stereo(OR mono) Microhone.