Hybrid Dual Imaging (HDI) transducer (83/200/455/800): The power of two award-winning technologies: Broadband Sounder PLUS Exclusive DownScan Imaging : combined to provide the best-possible view beneath your boat. The HDI Black Med/High/455/800 Kilohertz xSonic Transducer has a 9-pin connector and supports Medium and High CHIRP, plus DownScan Imaging .• Mounting Location: Transom Mount• Number Of Pins: 9 Pin• Depth: 3000 Feet• Frequency Range: 83/200/455/800 kHz For Broadband Sounder, 455/800 kHz Med/High For DownScan Imaging 83/200/455/800 kHz For Broadband Sounder 455/800 kHz Med/High For DownScan Imaging Replacement Mounting Kit For DSI Skimmer | Simrad HDI Skimmer Transducer in Black