Lowrance Elite-4 HDI chartplotter fishfinder combo comes with a high resolution LED backlit display that allows multi-window imaging. You can choose three-panel viewing that will include DownScan Imaging, chart and Broadband Sounder.
The most important factor when choosing a chartplotter fishfinder combo is the display screen. We always opt for the largest highest-resolution screen we can afford.
Look for a chartplotter fishfinder combo that meets your connectivity needs. If you have an older boat that is not likely to get rewired with a NMEA 2000 network backbone you certainly wont need to worry out having that capability in the chartplotter you buy.
Cartography is another item to consider prior to purchase of any chartplotter fishfinder combo unit. You may already own or be able to trade up on a certain brand of chart card.