This portable, castable fish finder comes with a wireless sonar sensor that connects to the handheld unit at a maximum distance of 262 feet, eliminating the need to drill holes in boat hulls for installation. The sensor features small holes to attach to fishing line, allowing you to cast it out as far as needed. It displays key fishing data including water depth, temperature, fish size (small, medium, or big), fish depth, and bottom contour, with both work and simulation modes available. Depth and temperature measurement units can be converted, and the sonar has a 105-degree beam angle with a depth range of 2.6 to 164 feet. The clear color LCD screen offers two selectable background colors, black and white, for visibility in bright sunlight or at night. This fish finder works for various environments including lakes, rivers, and seas, and is suitable for shore fishing, kayak or boat fishing, and ice fishing. It includes a 2-year warranty with brand support available online within 24 hours for any -purchase issues.