About this itemBuilt-in 3.5mm listen only earpiece for the ultimate accessory solution in loud environments!Compact&Rugged Construction, High Impact Strength High Quality Plastic Casing, for Shock, wind, dust, and splash resistance. It is a High quality microphone with Crystal clear audioWide PTT Key, 360 degree clip, 3.5mm accessory jack on 1 sideOmni-Directional Microphone & Electret Speaker Transmit High Quality Sound Even in Loud EnvironmentsKevlar Reinforced PU cable & Durable Coil Cord, High Tensile Strength and Long-life Design Product DescriptionSPEAKERDimension (mm)： ￠36Sensitivity ： 114±3dBImpedance： 8Ω/ 16ΩRated output power： 1WPeak power output： 2WMICROPHONEDimension (mm)： ￠6*5Sensitivity： -38±3dBFrequency： 1kHzImpedance： 2.0V/2.2KΩOperation voltage： 1-10V Kymate Pm01 Microphone SPEAK MICCompatible Radio Model:ANYTONE AT-D578 AT-D868UV AT-D878 BTECH DMR-6X2RETEVIS R1 RT-3 RT-3S RT-8 RT-52 RT-82 RT-84RUGGED RADIOS R1 RDH-16TYT MD-380 MD-390 MD-1701 MD-UV380 MD-UV390Anytone D-868 D-878 UV 11 PLUSMD-380 MD-390 MD-UV380 MD-UV390 MD-280 MD-280 Plus MD-UV450 MD-446RADIODDITY GD-77/GD-77SNKTECH MD-380U MD-380V MD-380GNotice: If your walkie-talkie type is not in the list above, please see my other items or email us your model number, then, we will help you find one that suits for you. Package: 1 x PK01 Microphone SPEAK MIC