1. Fish Finder: You can know the fishing information such as water depth, approximate fishes location,sand&rocks,short or tall weeds through this portable fish finder. These handheld fish finders have all basic functions compare to other portable fish finder. Before your casting fishing rod,use the kayak fish finder to detect if there is the right spot for fishing. The portable fish finder has the handheld size for easily holding and carrying on. 2.Wired Transducer Fishing Sonar: 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 fish 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. 3.Handheld Fishing Finder For Boat Kayak: The kayak fish finder will help to know the depth of the fishing area and it would be the good tool as depth finder.You could know the water depth and fish depth as the warming up. These depth fish finders can be used to locate fishing areas and detect fishes schools. Through the strap in the package,you can just hang it around neck.Free your hands and focus on bite. 4.Water Depth Finder Marine Using: The handheld fish finders need 4 AAA batteries. It could continuous works 4-5 hours with brand batteries. The battery save mode on kayak fish finder will help to work longer time. The LCD display can be clearly readout in day or night. Choose this as the gift to your family or friends,they will thanks to your ideas because of its excellent performance.