Key benefits The included wire sonar sensor transducer delivers powerful and reliable sonar signals for accurate detection of fish and underwater structures, with a wide coverage range that helps you explore larger areas and locate more fish. Easy to use and portable: intuitive interface and userfriendly controls; compact design makes it easy to mount on any fishing kayak, boat, or dock. Accurate depth reading: portable fish finder uses advanced sonar technology to provide precise depth readings, enabling you to determine water depth and locate productive fishing spots. (4XAAA battery not included) Realtime temperature display: temperature sensor measures water temperature in real time, helping you understand fish behavior and improve your chances of a successful catch. Core features Wire sonar sensor transducer included for strong, reliable sonar signals and broad coverage. Portable fish finder with an intuitive interface and simple controls. Advanced sonarbased depth readings for accurate water depth assessment. Builtin temperature sensor for realtime water temperature display. Specifications and compatibility Battery: requires 4XAAA batteries (not included). Mounting: compact design suitable for mounting on kayak, boat, or dock. Sensor: included wire sonar sensor transducer for expanding detection range. Use scenarios Scenario 1: Kayak fishing in coastal or freshwater environments with varying depths; scan for dropoffs, structures, and fish schools across a broad area. Scenario 2: Small boat or pontoon trips along reefs, wrecks, or shelves; monitor depth changes and water temperature to understand fish behavior and improve targeting. Scenario 3: Shore or jetty fishing from a dock; quickly set up and move the portable unit between a kayak, boat, and dock as needed for versatile fishing bursts.