Wireless portable fish finder with a compact, easytocarry design for fishing trips 40meter sonar range and depth alarm to detect fish and trigger alerts at the desired depth LCD display provides clear data on depth, fish depth scale, water temperature, and other performance information Multifunctional fishing helper that helps you identify fish locations and reduces the need to constantly watch the float Use scenarios Boat or kayak fishing on a lake: use the 40meter sonar to locate fish and structures, set the depth alarm to alert you when fish move to your lure depth, and adjust your rig accordingly Shore or bank fishing: quickly identify fish presence near dropoffs, weed lines, or ledges from the bank, enabling accurate cast placement and better lure depth control Depthbased scouting in varied water: monitor depth and temperature to determine fishing depth around underwater structures, improving cue interpretation and catch opportunities