The Stryker SR-76NC is an electret noise cancelling microphone compatible with nearly any CB radio, and most 10 meter radios. The combination of electret technology and noise-canceling capabilities results in a microphone that can transmit clear, crisp audio, even in noisy environments. This is particularly important in CB communication, where clear speech can be critical. The noise-canceling feature helps eliminate unwanted sounds, such as wind, engine noise, or other environmental sounds, making conversations more understandable and less tiring for both parties. The electret design requires a single AAA battery (not included) and provides excellent frequency response for maximum clarity.