1. Handheld Fish Finder for Fishing : The fish finder portable has all basic functions compare to other fishing fish finders. It can be used to locate fishing areas and detect fishes schools.Equipped with the wired sonar sensor,it would be more accurate to detect and show information such as water depth, approximate fishes location,sand&rocks,short or tall weeds on the handheld unit. 2. Water Depth Finder & Fishing Finder : It will help to know the depth of the fishing area and it will be the good tool as depth finder.You could know the water depth and fish depth as the warming up. The portable fish finder with the handheld size for easily holding and carrying on.Through the strap in the package,you can just hang it around neck.Free your hands and focus on bite. 3. Wired Fishing Sonar Transducer : The detection range of the sonar transducer is from 3ft to 328ft below the sonar transducer.Considering for your convenience,you can adjust to display in feet or meter on portable depth finder. Before your catching,you can know the depth of bottom and fishes location. The water sonar transducer is with 25ft cable and removable float. 4. Wide Applications Water Depth Finder : The adjustable sensitivity of this handheld fish finder would not only detect the small sizes fish,but also filter unimportant information.5 sensitivity options is enough for different environments.The portable fishing sonar could be widely used in various occasions such as bank fishing,ice fishing,lake,sea boat shore fishing and so on. Moreover, the wired transducer is also easily be attached to the hull of the boat or kayak.