The Humminbird LakeMaster Great Lakes Edition, Version 4, micro map card with SD adapter has added over 140 lakes since the prior version - 50 in High Definition - and boasts more than 380 lake maps in High Definition and over 1,540 total lakes from MI, IN and OH.

• Updated shallow water area for Lake Michigan and parts of Superior; Full coverage of Superior; all Lk Huron; Beaver Island on Michigan in HD and more
• LakeMaster SD/micro cards include features such as Depth Highlight, Shallow Water Highlight and Water Level Offset, which can be used exclusively with Humminbird fish finders
• Can be used with Minn Kota i-Pilot Link allowing you to Follow a selected depth contour line, delivering precise, automatic boat control
• Scrollable lake list allows you to view and research lakes from your Humminbird fish finder on and off the water
• The Great Lakes product no longer includes Kentucky and Tennessee lakes. See the LakeMaster SouthEast Edition products for lakes in these states.
• Opened packages are not eligible for return.
• LakeMaster cards are compatible with all GPS-equipped HELIX, SOLIX, ONIX and ION Series models, along with select 600-1100 Series models.