This is a fish detection device named "Rechargeable Dot Matrix Fish Finder". It is powered by a rechargeable battery and can be used for a long time without replacing the battery. It is very convenient to use. The detector is equipped with a dot-matrix LCD screen to observe the distribution of fish more clearly, and it is easy to see details such as the density of large and small fish and fish schools. In addition, it adopts advanced sonar technology and probe design, which can accurately detect the depth of the bottom, water temperature, water substrate, and fish location, concentration, size and other information, helping fishermen find suitable fishing spots and improve Fishing success rate. In addition, the detector also has an alarm function. When a fish is detected, it will automatically alarm to remind fishermen to fish in time, increasing the fun and effect of fishing. The rechargeable dot matrix fish finder is easy to operate, easy to use, light and portable, suitable for use in various occasions, whether it performs well in rapids, lakes or oceans, it is a good tool worth buying.