Garmin 400C Dual Frequency Special Features
- New bright color display for easy viewing in any lighting condition.
- Dual Frequency transducer for improved readings in shallow and deep water.
- 50/200Khz Dual frequency, 500 Watt output power.
- Waterproof and one Year Warranty.
- UltraScroll for fast screen updates.
![]() |
![]() |
![]() |
High End Features in a Low Cost Color Fishfinder!

The Garmin Fishfinder 400c dual frequency is the perfect color fishfinder for 15-21 foot boats. The 400C features a beautiful 4” color, ultra-bright QVGA, 320 x 240 pixel display, that is viewable in any lighting condition. The Fishfinder 400C’s Dual Frequency sounder will output 500 watts of power for readings down to 1500 feet deep. The included Dual Frequency transom mount transducer has a 50kHz and 200 kHz frequency for excellent readings and clarity in both deep and shallow water. Garmin did not stop there, the 400c features 2X, 4X, and bottomlock zoom and an A-scop for real time fish detection. Using the Fishfinder 400c could not be any easier with the AutoGain technology for better target visibility and the new night mode and backlight keypad for night use. Other features include Garmin CANet capability, Alarms for fish, shallow water, deep water and low battery, and UltraScroll for fast screen updates.
Waterproof to IPX-7 standards. One-Year Warranty. Unit dimensions 5.72”W x 5”H x 2.73”D













