The Lowrance Active Imaging Transducer is a high-quality sonar device designed specifically for fishing enthusiasts. This transducer, compatible with the Lowrance brand, is a waterproof and durable unit made of plastic. It comes in a sleek black color and includes mounting hardware for easy installation. With its electric corded power source, this transducer allows for accurate sonar readings to help you locate and catch fish with precision during your fishing adventures. the Lowrance 003-2703-00 transducer (which corresponds to the HST-WSBL 83/200kHz transom mount transducer) is compatible with Simrad NSS4 displays, as both brands are owned by Navico and share compatible 7-pin blue connectors.Compatibility Details:Plug-and-Play: The 7-pin blue connector on the Lowrance HST-WSBL fits directly into the sonar port on the Simrad NSS4.Transducer Selection: When setting up the NSS4, you should select "HST-WSBL" or "Generic 83/200" in the sonar installation menu to ensure accurate readings.