Product Description:
The 581i Combo features an ultra-high resolution, 16 level grayscale 640V x 320H 5" display, DualBeam sonar with 2000 Watts PTP power output, and GPS Chartplotting with built-in UniMap.
Display

• 5.0" diagonal
• 640V x 320H
• FSTN LCD

Memory

• Waypoints: 3,000
• Routes: 50
• Tracks: 50 w/20,000 points each

Sonar: DualBeam

• 200 kHz / 20° @ -10db
• 83 kHz / 60° @ -10db
• Depth: 800 ft.

Additional Info:
Manufacturer: Humminbird
MPN: 407330-1
Product SKU: HUM-407330-1
Weight:3.00 pounds