Description1. All of items are Brand New.2. Simply plug the mic speaker into your Radio, you could chat with your partners without holding your radio on hand 3. Applications:Relevant personnel : police, bouncer, and businessman .color: BlackMaterial: ABSRelated sites : nightclubs, , security, restaurants, hotels, airports, casinos, manufacturing plants, conventions , concerts,warehouses, and noisy environments.Impedance: 2.2ohm.Sensitivity:-36dB / - 2dB.Frequency response: 20Hz-1.6KHz.Applicable Models:TK Series: TM-231, TM-241, TM-731A, TM-631A, TM-201A, TM-401A, TM-201B, TM-401B, TM-211A, TM-411A, TM-221A, TM-321A, TM-421A, TM-521A, TM-231A, TM-331A, TM-431A, TM-531A, TM-241A, TM-441A, TM-541A, TM-701A, TM-721A, TM-621A, TM-2530A, TM-2550A, TM-2570A, -4100A, -4000APackage Contents:1 x TM-241 MicrophoneOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.