HELIX G2/G2N came in 5, 7, 9, 10, and 12 inch ...
HELIX G3/G3N comes in 7, 8, 9, 10, and 12 inch ...
https://www.humminbird.com/news/arti...neration-helix
HELIX G3/G3N versions have Dual Spectrum CHIRP 2D sonar and imaging models have MEGA + (more range than MEGA) ...
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*G2 and G3 models have no networking capabilities ...
*G2N and G3N models have networking capabilities ...
Rickie