Humminbird Fishfinder 581i Combo Review
- Front mounted internal GPS allows in-dash mounting
- Single Front Side SD card slot
- 5" mono FSTN LCD
- 640V x 320H
- 16 Level Grayscale
- Temp Included
- GPS Speed Included
- Dual Beam
- 83 kHz/60 degrees & 200 kHz/20 degrees
- 250 Watts RMS
- 2000 Watts PTP
- 50 Channel GPS
- UniMap Built-in
- Navionics Compatible
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