A dynamic noise-canceling mic to improve overall sound quality Description If you want to alert your fellow CBers to a lane lover or dream weaver up ahead, you need a reliable mic to get that message across. The Astatic 636L has a powerful noise-canceling system and a tailored frequency response system that provides maximum chatter power. Say over-and-out to wind or vehicle noise when you hit the airwaves with this reliable microphone that’s compatible with all four-pin CB radios, including, Cobra, Uniden and Galaxy models. Specs Model / SKU: Astatic 636L-B1 Product Details: Dynamic noise canceling improves sound quality Impedance: 200 ohms, matches any radio Cable: six wires, five conductors (one conductor shielded), super-flex cord with durable strain relief Connector: 4-pin female locking ring connector Switch: DPDT smooth operating, long life, trouble-free switch with spring return Housing: durable molded black ABS Cycolac Package type: clamshell packaging Frequency response: 100 to 5,000 Hz Output level: 58dB - 76dB Compatible with: CB radios with a 4-pin microphone connection. Details Help me choose PRODUCT OPTIONS COLOR Choosing Antenna Color This is a 100% personal decision! Choose your favorite color, or what goes best with your vehicle.