The product is a rare and unique RF Limited EC-2018 Turbo Echo CB Ham Microphone with 5 pin DIN connectivity. It is designed to be compatible with various brands and offers a specialized 5 pin connection for easy setup. This microphone is specifically geared towards radio communication enthusiasts who value high-quality equipment and unique features for their automotive communication needs. Features echo volume and echo delay without adding a board to your main unit. Requires a 9 volt battery that is not included. This mic has a 5 pin DIN connector. Please check your unit for compatibility.