PRODUCT SPECIFICATION:
1) Display: 3.9inch high-contrast 4-level grayscale FSTN LCD
2) Back lighting: On/off White LED
3) Depth Capability: 540feet(180m)
4) Power Requirement: 11 to 13V DC
5) Water depth,water temperature, fish location, bottom contour can be constantly obtained from the water
6) User selectable sensitivity,zoom,units,depth range,shallow alarm,fish icon,fish alarm,and chart speed setting
7) Built in memory stores sonar setting when the fish finder is turned off
8) Operational Temperature: 14°F to 122°F(-10°C to 50°C)

This model is sensitivity adjustable.

This model can detect water depth capability is (540feet)180m.

It can setting up Zoom in/out,and show the Clear Fish ID in the monitor.

This model setting up function；
1.Depth Alarm
2.Fish alarm
3.Battery alarm

FF918-C180S sonar coverage is 45 degree beam angle in 200Khz.

1. Up arrow key
2. Mode key
3. Power/Menu key
4. Sensitivity key
5. Down arrow key
6. Light key

1-Sensitivity
2-Water Depth
3-Temperature
4-Small fish icon with depth
5-Large fish icon with depth
6-Bottom contour
7-Battery indicator
8-Upper Zoom Range
9-Water Surface
10-Medium fish icon with depth
11-Lower Zoom Range