Venterior VT-FF001 Portable Fish Finder, Fishfinder with Wired Sonar Sensor Transducer and LCD Display Detects and displays water depth, approximate fish location, short & tall weeds, sand & rocks on seabed. Backlight mode enables you to use the fish fish finder at night. Applies to lake, river, sea and other fishing environment. Can be used for off shore fishing, boat fishing, ice fishing, lake fishing, sea fishing and so on. Comes with round transducer with 25 ft cable and removable transducer float. Detectable water depth range is from 3ft to 328ft. Various features settings: 5 user selectable sensitivity; battery save mode; backlight mode; fish alarm; unit of measure. Water depth shows either in feet or meters. Warranty: This device is covered by a 2 Year Warranty. Any questions before or after purchase, please feel free to contact us via Amazon message or customer support on product package (response within 24 hours every day online).