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echo™ 300c

echo 300c is the only colour, dual-beam fishfinder on the market at this price, making it the premier sonar option for fishermen on a budget.

See What Lies Below

echo 300c is designed to make catching fish a cinch. It’s just that simple. The system’s 3.5 in sunlight-readable display and exclusive Garmin HD-ID™ target tracking technology let you see through the water like never before. Plus, a 300-watt (RMS) sounder offers a viewing angle of up to 120 degrees and bottom detail to 1,500 ft. For an uninterrupted view of the sonar image, echo 300c also boasts Garmin Smooth Scaling™ technology, which means you won’t lose sight of the sonar history as the unit changes depth ranges.

Mount & Go

Designed with simplicity in mind, echo 300c is one most intuitive fishfinders on the market. Installation takes only a few minutes using the quick-release tilt mount and versatile transom-mount transducer included in the box.

echo 300c features:

  • Garmin HD-ID™ technology

  • 300 watts (RMS) transmit power

  • Depths to 1,500 ft

  • Beam width to 120 degrees

  • 3.5 in sunlight-readable colour display

  • Tilt/swivel mount, transducer, trolling motor clamp and transom mount


Physical Performance
Unit dimensions, WxHxD: 10.4 x 14.7 x 7.1 cm
Display size, WxH: 5.3 x 7.1 cm; 8.9 cm diag
Display resolution, WxH: 240 x 320 pixels
Display type: QVGA, 256 colors
Weight: 330 g
Waterproof: yes (IPX7)
Features & Benefits:
Audible alarms: yes
Dual-frequency sonar capable: yes
Dual-beam sonar capable : yes
Split-screen zoom: yes
Ultrascroll® (displays fish targets at higher boat speeds): yes
Fish Symbol ID (helps identify fish targets): yes
AutoGain Technology (minimizes clutter, maximizes targets): yes
Whiteline (indicates hard or soft bottom): no
Adjustable depth line (measures depth of underwater objects): yes
A-scope (real time display of fish passing through transducer beam): yes
Bottom lock (shows return from the bottom up): yes
Water temperature log and graph: yes
Water temperature sensor included: yes
Water speed capable (displays speed on water): yes
Frequency: 200/77 kHz
Transmit power: 300W (RMS)/2,400W (peak to peak)
Voltage range: 10V - 28V input
Maximum depth: 1,500 ft fresh water*
600 ft salt water*
Cone angle: 60º or 120º (dual beam)

*Depth capacity is dependent on water bottom type and other water conditions.

What's in the Box:

  • echo 300c

  • Quick release mount with tilt and swivel

  • Power cable

  • Transducer w/ mounting bracket, hardware and trolling motor clamp

  • Documentation

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 Transducer Accessories

Water Speed Sensor (4-pin)

Suction Cup Transducer Adapter


Quick Release Mount

Flush Mount Kit


Power Cable

 Cases and Covers

Protective Cover


Female 4-pin to Male 6-pin Transducer Adapter


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