Originally Posted by Joby @ Humminbird

SwitchFire is the same as TVG. You will have a Clear Mode and a Max Mode in the SwitchFire .

CLEAR MODE advantages:
Great shallow water performance, eliminates surface clutter
A clean screen without a lot of screen clutter associated with particles in the water, etc.
Works well in rough, turbulent water
Compensates for differences in strengths of return due to depth differences

MAX MODE advantages:
Incredible detail of structure and fish
Excellent lure tracking performance
See tiniest subsurface objects, including thermoclines, water currents, and plankton