Venterior Portable Fish Finder Ice Kayak Boat Fishing Gear Basic Water Depth Finder Handheld Fishfinder with Sonar Transducer and LCD Display. Shows you what is in the water: Detects and displays water depth, approximate fish location (suits for all sorts of fish), short & tall weeds, sand & rocks on seabed. Suitable for fishing from a kayak, off the dock, and ice fishing. You can use the fish finder on moving kayak with slowly speed below 5mph (make sure the bottom of the transducer is horizontal). Easy to Use: Toss the transducer into water and turn on the display unit, it will show you the water depth and approximate fish depth if fish schools passing by. It has 5 user selectable sensitivity; battery save mode; backlight mode ; fish alarm; unit of measure. Setting can be saved when turned off. Very portable that you can take it anywhere: It comes with neck strap that allow you to wear it around neck when you are busy on the kayak. It also comes with a water resistant bag to protect your fish finder display from water splash. You can easily store the fish finder in your tackle box. The fishfinder is powered by 4 AAA batteries. It lasts 4-5 hours with new batteries in continuous use. It can be used in fresh water as well as salt/sea water.