Are Humminbird Units Compatible with SDHC Cards?

The answer to this question is model and software version specific.  SDHC is compatible with all 300, 500, 600, 700, 800, 900, 1100, HELIX, ONIX, ION, SOLIX and APEX Series products with color displays at software version 3.7x0 or higher. On monochrome 700 series you would need version 3.8x0 and higher. Older versions of software or older products will not be compatible. 

The highest capacity we support is 32GB.

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