Code Red Signal 21 Microphone . This hands-free Code Red Microphone meets water wind dust and impact resistance standards so you can trust it in the worst conditions. The compact and lightweight Code Red 21 Microphone w/ Boom Arm Rotating Clothing Clip is extremely versatile for use with Motorola and Kenwood radios and the boom arm pivots to fit the mike close to your mouth to minimize wind noise. Be sure to check out our collection of other Communication Devices from Code Red in the Code Red Communication Devices section of our store. Package Contents: Code Red Signal 21-k Microphone The Code Red Signal 21-k Microphone is a quality addition to the Code Red lineup. For more great deals on Travel Accessories by Code Red please browse our Code Red Travel Accessories page.