RFL EC2018 XTREME GENERAL: Digital Echo for the Next Millennium. The EC-2018 XTREME is the latest digital echo microphone for Citizen Band and other two way radios. The EC-2018 XTREME takes CB Radios to the extremes with new features like ENDLESS ECHO, DOUBLE TALKER and NOISE REDUCER. Make your radio sound its best with the EC-2018 XTREME. CYBORG-Robotic Voice: Sound half man, half machine. STADIUM SOUND: Having the booming sound of a stadium announcer. ENDLESS ECHO: An unbelievable digital echo with a range from no echo to a never ending, repeating echo. DOUBLED TALKER: Repeats everything you say...repeats everything you say. This could get annoying...this could get annoying. Good thing you can turn it off...good thing you can turn it off. WHAMMY SOUND EFFECTS: Adjust the echo controls while transmitting to create the wildest sound effects. NOISE REDUCER: Advanced noise reduction circuit discreases microphone sensitivity and reduces background noise, making sure they hear you and not your vehicle! TALK BACK: Monitor your transmissions - know exactly what you sound like over the air. ALSO: Echo controls on the outside of the microphone, so you are always in complete control, and the highest quality, and softest neoprene 6 conductor microphone cord. EC-2018 TURBO; FEATURES, FUNCTIONS AND SPECIFICATIONS: * Same great Echo as EC-2018 TURBO with following additional features: * Best selling Echo Microphone in USA * Loudest and Clearest Echo Sound Available * TURBO Digital Echo with External Controls * Talk Back with Volume Pot (works with Cobra, Uniden CB Radio) * Pre-Wired for 4-Pin Radios using Uniden wiring EC-2018 XTR; FEATURES, FUNCTIONS AND SPECIFICATIONS: * Same great Echo as EC-2018 TURBO with following additional features.... * Double Talker Echo - Switch Echo from TURBO to DOUBLE TALKER for a single Repeating Echo. * Noise Reducer - 2 Stage Microphone Sensistivity Control for High Noise Environments. WIRING OF MIC CABLE: Black Wire = PTT Common Ground Shield Wire = Ground Yellow Wire (if available) = Ground Red Wire = Audio Output White Wire = PTT TX Blue Wire = PTT RX