Which Humminbirds have dedicated down imageing crystals?

[RogerA]

Could someone please tell me which units have the dedicated crystals for down imaging.

[rnvinc]

The simple answer would be any of the HB units that actually have "DI" in the model name....

Rickie

[Humminbird_Greg]

345c DI
385ci DI Combo
570 DI
596c HD DI
597ci HD DI Combo
788ci HD DI Combo

The Combo units mean that they come with a GPS Receiver, all of which are internal.
Those with a “c” after the numbers mean that they have a color display.

[Superx10]

All of the SI units will do Down Imaging also

[mduncan62]

All of the SI units will do Down Imaging also

The SI units do not have a dedicated crystal though, but yes they do DI also.

[RogerA]

Thanks for the info.