Detect Water Condition It detects water depth, approximate fish position (suitable for all kinds of fish), the size of the fish, and bottom features such as short and tall weeds, sand, and rocks. This information helps you choose where to fish and how deep to target. Easy To Use Simply throw the sensor into the water and turn on the display device. If a shoal passes by, it displays the water depth and the approximate depth of the fish, providing quick, actionable guidance. Multifunction Selectable sensitivity to adapt to different water conditions. Power saving mode to extend battery life. Backlight mode for readability in low light. Fish alarm to alert you to nearby activity. Measurement unit selection to match your preferences. Settings can be saved after closing for quick startup next time. Accuracy Uses sonar to accurately detect water depth and fish position, delivering reliable readings for fishing decisions. Use Scenarios Freshwater lakes with weed beds and rocky bottoms: identify fish presence and bottom structure to plan casts and target depths. Boat or kayak scouting: quickly survey depth and fish depth to guide where to cast and how to maneuver. Shoreline or lowlight fishing: backlight mode improves display visibility while fishing from shore or a boat at dawn or dusk.