◆Speaker Impedance:16Ω ◆Speaker size.:φ13mm ◆Microphone specification: 6.0 X 5.0mm ◆Microphone Impedance:2.2KΩ ◆Microphone Sensitivity:-54dB ● Plus tpye: STANDARD.KENWOOD.YAESU.ICOM. MOTOROLA.MAXON....etc