Hummingbird 859 CI HD DI

Well just pick up an hummingbird 859 ci HD DI with south East map card which it had, but as usually no transducer..hope to pick one up which shows XNT9 DI T.would work but it shows two others XTM 9Dt 25 T and XTM 9 wide DI 20 T mush be something new?try to get fish finder were I can see mostly speed and dept when I fish,the garmin I have can’t see the numbers on it due to eyes not as good as they use to be.don’t know any thing about this fish finder shows self test as past and somehow 27 hours total,can any body reset the hours on the units are just hummingbird.well hope it works out.just looking for any info on this unit would help thank you

XNT 9 DI T is the stock transom style DI xducer - 200kHz 28°/455kHz 16° for 2d and 455kHz 75°/800kHz 45° for DI ...

XTM 9 25 DI T is the trolling motor version DI xducer with same beam specs as above ...

XTM 9 WIDE DI 20 T is also a trolling motor version but is considered an “upgrade” DI xducer - 83kHz 60°/200kHz 20° for 2d and 455kHz 75°/800kHz 45° for DI ...
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No user is able to reset total hours ...

Rickie