what model? does it have side image and down image? Doe it work?
There are two 998's and both are Side Imaging units.
Which one is not stated.
998c SI Combo has CCFL backlighting.
998c HD SI Combo has LED backlighting and is the newest version.
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, SOLIX 12 SI, 360, RC-1