Description 1. 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, , and businessman . color: Black : ABS Related 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, -4000A Package Contents: 1 x TM-241 Microphone Only the above package content, other products 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.