Commountain Single Wire Surveillance Earpiece/Headset KitFeatures: -Single Wire Surveillance kit with Quick-Disconnect Acoustic Tube -Surgical Grade UV Resistant Acoustic Tube, Comfortable & Durable -PU cable Reinforced by Kevlar Fiber, High Strength & Durability -High Quality Speaker & Microphone Enable Sound to Be Transmitted Clearly Even in Loud Environment -Compact Mic with Side PTT & Rotatable Steel Clothing Clip -Rugged ConnectorDimension Specification: -Dimension of Mic/PTT Housing: 1.38x0.78x0.51 inch (HxWxT) -Cable Length Between Connector and Mic/PTT: approx 29.5 inch (Standard Version) -Cable Length Between Mic/PTT and Ear tip: approx 22 inch -Cable Diameter: 2.5mmSpeaker Electric Specification: -Type: Electret Speaker -Impedance: 90?±15% at 1.0KHz 1.0V -Rated Input Power: 0.01W -Sensitivity: 115dB±3dB -Frequency Response: 0Hz-12KHz Average SPL-10dB -Distortion: 10% Max at 1.0KHz/1.2mWMicrophone Electric Specification: -Type: Condenser Microphone -Output Impedance: 2.4K?±10% -Sensitivity: -43dB±2dB (1V/Pa) -Frequency Range: 50Hz-10KHz -Directivity: Omni-Direcctional -Working Voltage: 2V (10V Max.)Compatible for Motorola Radios As Follow: BC10 BC120 BC130 BRP40 BC90 CP100 CP110 CP125 CP150 CP185 CP200 CP200D CP200XLS CP450 CT150 CT250 CT450 CT450LS CLS1110 CLS1410 DTR410 DTR550 DTR650 DLR1020 DLR1060 GP280 GP68 GP88 GP300 GP308 GP2000 GTI GTX LTS2000 MAG ONE P040 P080 P110 P1225 P1225LS PR400 PRO3150 RDU2020 RDU2080D RDV2020 RDV2080D RDU4100 RDU4160D RDV5100 RMU2040 RMU2043 RMM2050 RMU2080 RMU208D RMV2080 SP10 SP21 SP50 XTN446 XTN500 XTN600 XV1100 XV2100 XU1100 XU2100 XU2600 VL130 VL50