Hand-hold sonar fish finder with 4 AA battery(FFW718)

Specification:
LED backlight with wide window display
4xAAA batteries
Battery save mode
Battery strength indicator
Levels sensitivity setting
High/Low sensitivity setting
Clear fish icon
Fish alarm

Bottom contour

User selectable meter or feet readings
Water Temperature Indicator
Water resistant design

Able to shoot through boat hull and clear ice
Can display different bottom (grass, sand, rock) in the sea
Can resist the interference from the grass when use in lake