FishHunter is a portable fish finder and depth finder. It measures water depth and bottom contour to 100ft (30m), surface water temperature and shows fish on the screen of your smartphone or tablet. We manufactured the FishHunter Portable Fish Finder with military grade specifications, so it can be used wherever you want to fish, including ice fishing. It works over Bluetooth and requires no cell reception to work. Perfect for kayak fishing, small boat fishing, shore fishing and ice fishing. Amazon Prime Eligible.