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1. Get the approximate location of fish and the depth of water
2. With fish depth scale and audible fish alarm
3. User selectable meter or feet readings

Specification :
1. Measure Units: Meters / Feet
2. Display: TN/Anti-UV LCD display
3. Backlighting: green LED backlight
5. Depth Range :
Max: 100m (328.08feet) ; In: 0.4m (2.30 ft)
Accuracy:10cm.
6. Sensor Beam Angle: 45 degrees
7. Display the nature or circumstance of bottom of Sea (i.e. grass， rock and sand)
8. Operating Temperature is from -20°C to 70°C (-4°F to 158°F)
9. Uses 4 x AAA batteries (not included)