Features Sensitive --- The sensitivity can be adjusted freely according to the depth of water. Detect and display water depth --- approximate fish location, fish size, short & tall weeds, sand & rocks on seabed. Setting can be saved when turned off. Apply to lake --- river, sea and other fishing environment. Depth range from 1M to 100m. NOTE: The depth is measured from the sonar sensor, not the float. Round transducer with 25 ft cable and removable transducer float. Can be used for fishing off the dock, on a boat, and ice fishing. Various features settings --- 5 user selectable sensitivity; battery save mode; backlight mode; fish alarm; unit of measure. Water depth shows by meters/feet. Features:Sensitive: The sensitivity can be adjusted freely according to the depth of water.Detect and display water depth, approximate fish location, fish size, short & tall weeds, sand & rocks on seabed. Setting can be saved when turned off.Apply to lake, river, sea and other fishing environment. Depth range from 1M to 100m. NOTE: The depth is measured from the sonar sensor, not the float.Round transducer with cable and removable transducer float. Can be used for fishing off the dock, on a boat, and ice fishing.Various features settings: 5 user selectable sensitivity; battery save mode; backlight mode; fish alarm; unit of measure. Water depth shows by meters/feet. Specifications: Condition:100% Brand New Color: As shown in the picture Measure Units: Meters / Feet Display: LCD  Backlighting: LED 4.6cm diameter Round transducer sensor Depth Range : maximum: 100m (328ft) ; Minimum: 0.9m (3ft) Sensor Beam Angle: 45 degrees Display the nature or circumstance of bottom of Sea (i.e. grass, rock and sand) Operating Temperature is from -10°C to 45°C (14°F to 113°F) Battery: Uses 4*AAA batteries (Not included) Package List:1*Fish Finder 1*Instruction Manual 1*Lanyard 1*Fixing Screw 1*Fixing Frame 1*Sensor Package List