Xtenzi Bluetooth Microphone Mic Assembly For Kenwood External Car DVD Nvigtion, Ref W01171805, W01176815 Adopting electret condenser cartridge with high sensitivity , low impedance , anti noise and ant jamming capability , with fast and accurate data transmission, which could guarantee the voice clearly and stably under kinds driving occasions, it's highly improved the speech quality of hand free car kit communication system. Adopting humanity design with U shape fixing clip , is more easy to install and reliable. Kenwood part no: Kenwood W01-1718-05 Kenwood W01-1768-15