Lowrance Mark 4 HDI No Transducer

The display allows anglers to see more sonar history, larger chart images and more detail in split-screen mode. The Mark-4 HDI model features Hybrid Dual Imaging that combines Broadband Sounder with Down Scan Imaging technology to provide the best possible view of the water column. The Mark-4 HDI fishfinder has new page selector menu with quick access to all features using one- thumb operation. The new multi-window display enables users to choose up to three panels in split-screen mode to view chart, sonar and Down Scan Imaging simultaneously. Mark-4 HDI