Product details:

The all new, Humminbird LakeMaster PLUS digital GPS map card series is a new family of map cards that parallels the standard Humminbird LakeMaster editions. Coverage area and lake lists remain the same and both are compatible with most Humminbird GPS models including the ONIX and ION units. PLUS has all of the features you've come to love from LakeMaster, but now allows for aerial image overlay on high definition waters.