Maximize your angling experience with the Humminbird 688ci Fishfinder, featuring a 5 inch, 256 color display with backlighting that's viewable in any lighting conditions. The DualBeamPLUS sonar has a 3,000 foot depth capability, GPS chartplotting and a card slot for saving all your maps, tracks and waypoints to make the most of your fishing experience.

Specifications and Features:
Display Size: 5.0 inch diagonal
Display Pixel Matrix : 640V x 480H
Display Type: Color TFT
Display Colors/Grayscale: 256 Colors
DualBeam PLUS Sonar Coverage
200 kHz / 20° at 10db
83 kHz / 60° at 10db
50 kHz / 74° at 10db
Target Separation: 2.5 inch
Power Output (RMS): 100 Watts (RMS)
Power Output (Peak to Peak): 8,000 Watts (Peak to Peak)
Temperature: Included
Speed: GPS Speed Included
Backlight: Yes
Waterproof: Yes
Mount: Quick Disconnect
Unit Size: 6.9 inch width x 7.5 inch height x 4.5
Mount: Optional In dash
Unit Size: 6.9 inch width x 5.4 inch height x 1.25
Transducer Standard: x NT 9 20 T
Transducer Mounting: Inside Hull or Transom
Power Input: 10 20 VDC
Power Draw: 615mA
Screen Snap Shot to Memory Card
Sonar Recording
Split Screen Zoom
Split Screen Bottom Lock
Wide Narrow Cone Split Screen
Instant Image Update
Freeze Frame with the ability to Mark Structure on Sonar
Selective Fish ID+
Real Time Sonar RTS Window
Sonar Echo Enhancement
TrueArch Technology
Precision GPS
Trackplotting
Chartplotting
GPS Speed
3D Chart View
Large Digits View
Custom View Selections
Custom Digital Readout Selection
Selectable Display Colors
Selectable Background Colors
View Preset Keys
Temperature Alarm
Triplog
x Press Menu System