Re: garmin 300c and 400c
This is the deferent is how deep.
Adapts to freshwater and saltwater
The Fishfinder 400C is available with a choice of dual beam or dual frequency transducers ? so it?s readily adaptable for both freshwater and saltwater fishing. The 400 watt (RMS) dual beam version offers a wide fish-finding cone and reaches depths of 900 feet. The 500 watt (RMS) dual frequency setup can run as deep as 1,500 feet