Code Red Signal 21-K Public Safety Speaker Microphones with 3.5 mm port for Kenwood Radios

Available: In stock


  • NOISE CANCELLING - Reliability is crucial out in the field. Know that the person on the other end heard you loud and clear, without all the background static.
  • TOUGH AS NAILS - The Signal 21 microphone has been manufactured using the highest quality specifications to be water, wind dust and impact resistant. The radio connector cord includes a strand of Kevlar® to insure durability and reliability. The heavy-duty strain relief means longer service and less down time.
  • LIGHTWEIGHT - At only 3.6 ounces, the Signal provides tremendous durability and fits perfectly into the palm of your hand. It stays put thanks to the sturdy swivel metal clip that can be attached in any position of your clothing or tactical vest.
  • CODE RED QUALITY - We know there’s many choices of radio gear available, but you can be confident that our equipment stands out above the rest. When Code Red gets called out, get the message with Code Red Headsets.
  • 1 YEAR WARRANTY - We believe in our products, and we know they work as hard as you do. That’s why we include a 1-Year Warranty on everything Code Red.

Superior manufacturing, every time.

Don’t let the lightweight, ergonomic body fool you- this radio is built tough.

It’s made under IP68 military guidelines for water resistance, dust, sand, extreme temperatures and impact, because tough situations are when you need your radio most.

The cord is reinforced to protect against the abuse of a physically active job. The mounting clip is durable and strong as well, so that you can trust your radio to stay put throughout your shift.


An extra large Push-To-Talk button is fast and intuitive to find and press.

The 360 degree mounting clip allows you to place this radio in any spot on your gear that makes sense for your application, and the long coiled wire accommodates different positionings with ease. Signal 21-K holds on to with Tactical vests, polos, security uniforms, and more.

The Signal 21-K is made to withstand all types of uses, from public sector positions such as police and SWAT,  fire, fish & game, park rangers; and private applications such as security, EMT, airsoft and tactical simulation teams.

For Kenwood Radios.

A covered 3.5mm headphone jack allows discreet communications through a number of different Code Red silent earpieces.


The Signal 21-K features a 2-pin connector and is compatible with all of these radios:


Kenwood: TH D7AG, TH F6A, TH F7E, TH G71A, TH D72A, TH K20A, TH K21A, (ProTalk) TK 2100, TK 2200, TK 3100, TK 3200, TK 3201, (ProPower), TK 2102, TK 3102, TK 2160, TK 3160 (ProTalk XLS), TK 2130, TK 3130, (Free Talk XLS) TK 3131, (Free Talk XL) TK 3101, TK 208, TK 220, TK 240, TK 240D, TK 248, TK 250, TK 260, TK 260G, TK 270, TK 270G, TK 272G, TK 308, TK 320, TK 340, TK 340D, TK 348, TK 350, TK 353, TK 360, TK 360G, TK 370, TK 370G, TK 372G, TK 373, TK 430, TK 431, TK 2160, TK 2170, TK 3160, TK 3170, TK 3202, TK 3200, TK 3201, TK 3212, TK 3230, TK 3300, TK 3301E, TK 3302K, TK 3312, TK 3360. .

Wouxun: KG-UV6D, KG-UVD1P, KG-669. Puxing: 777, 888, 3288. Baofeng: UV-5R, UV-5R, UV-5rPlus, UV5RE, 666S, 777S, 888S.

Quansheng: TG-K4AT, TG-2AT, TG-45AT, TG-42AT, TG-22AT, TG-25AT. Hytera (HYT): TC-265, TC-365, TC-368, TC-620, TC-700EX.

Code Red Quality.

When Code Red is called out, you need to know instantaneously. Know you’ll be ready to answer the call with Code Red Headsets.

Code Red has been providing business radio users with high quality audio solutions since 1999.

Since then, we’ve expanded into industries all over the world- from airports, LEO, construction sites, all the way to the airsoft field. You can count on Code Red.