Features Sensitive: The sensitivity can be adjusted freely according to the water depth. Detect and display water depth, approximate fish location, fish size, short and tall weeds, sand and rocks on the seabed. The setting can be saved when turned off. Apply to lakes, rivers, seas and other fishing environments. Depth range from 1M to 100m. NOTE: Depth is measured from the sonar sensor, not the float. Round transducer with 25 foot cable and removable transducer float. Can be used for dock fishing, boat fishing and ice fishing. Various feature settings: 5 user-selectable sensitivities; battery saving mode; backlight mode; fish alarm; unit of measurement. Water depth is displayed in meters/feet. Features : Sensitive: The sensitivity can be adjusted freely according to the water depth. Detect and display water depth, approximate fish location, fish size, short and tall weeds, sand rocks on the seabed. The setting can be saved when turned off. Apply to lakes, rivers, seas and other fishing environments. Depth range from 1M to 100m. NOTE: Depth is measured from the sonar sensor and not the float. Round transducer with cable and removable transducer float. Can be used for dock fishing, boat fishing and ice fishing. Various feature settings: 5 user selectable sensitivities; battery saving mode; backlight mode; fish alarm; unit of measurement. Water depth is displayed in meters/feet. Specifications: Condition: 100% new Color: as shown in the picture Units of measurement: meters/feet Display: LCD Backlight: LED 4.6 cm diameter round transducer sensor Depth Range: Maximum: 100 m (328 ft); Minimum: 0.9 m (3 feet) Sensor beam angle: 45 degrees Show the nature or circumstances of the sea floor (i.e. grass, rock and sand) Operating temperature is -10°C to 45°C (14°F to 113°F) Battery: uses 4 AAA batteries (not included) How to use the sonar sensor: 1. Launch the sensor and float in the water; 2. Secure the side sweep adapter to the boat hull using the mounting tabs; 3. Attach the sensor to a handle, lower the sensor into the water. Package List