This product is designed for fishing liker. The unit can be used in the river?? the lake?? or the sea</br>It can help you find out the fish and measure the depth of the water?? Especially it can bring pleasure to you in fishing</br>Feature depth readout?? fish alarm?? selectable sensitivity?? fish depth scale?? etc.</br>Can read depth of fish and water?? display the rock or aquatic plant at the bottom</br>Sensor auto power off when out of water</br></br>Product Description</br></br><b>Features:</b><br> Detect and display grass?? short & tall weeds?? sand?? and rocks on seabed<br> Get the approximate location of fi