The nest fishing detection instrument is a device used to assist fishing. It is a FishFinder fish finder with underwater high-definition sonar and ultrasonic fish finding functions. The following is a five-point description of the detection instrument: 1. Fishing gear underwater high-definition sonar: FishFinder fish finder is equipped with a high-definition sonar technology that can scan and detect underwater. Through reflection and echo analysis of sound waves, it can provide detailed information about the underwater environment, such as water depth, water temperature, underwater structures, and the location of potentially hidden fish schools. 2. Ultrasonic fish finding function: FishFinder fish finder also has ultrasonic fish finding function. It emits ultrasonic signals into the water and receives the signals returned by the fish. By analyzing these signals, it can identify important information such as the location, size and number of fish, helping anglers find fish schools more accurately. 3. Control and display: FishFinder fish finders usually consist of a control unit and a display. The control unit has operating buttons and a control panel for settings and adjustments. The display will display underwater images, fish positions and other relevant information in real time, allowing fishermen to intuitively understand the underwater situation. 4. Enhance fishing effect: Using FishFinder fish finder can improve fishing effect and success rate. It helps anglers understand the location and behavior of fish schools, allowing them to select suitable fishing spots and bait in a targeted manner, thereby increasing the chance of catching fish. 5. Portability and ease of use: FishFinder fish finders are usually designed to be portable and equipped with a bracket for easy portability and installation. At the same time, it provides a user-friendly operation interface and is relatively simple to use. This allows anglers to easily carry and use the device and obtain good experience and results in different fishing situations. All in all, the FishFinder fish finder is a device that has underwater high-definition sonar and ultrasonic fish-finding functions for fishing gear. It uses sonic and ultrasonic technology to provide detailed information about the underwater environment and help anglers find schools of fish more easily. The device is portable and easy to use, helping to make fishing more effective and enjoyable.