The trouble with most depth sounders is that they can only see what's in a fairly narrow cone directly under your boat. However, the ultralight handheld DepthTrax? DT1H lets you aim its beam wherever you want to see, like an underwater flashlight.
One slide of the magnetic switch gives real time depth readings, while a second slide will indicate the current water or air temperature. Algorithmic programming virtually eliminates false readings while Shoot Thru Technology allows readings through ice and solid fiberglass or aluminum boat, kayak, or canoe hulls.
The impact resistant housing includes a wrist strap and the unit floats if dropped overboard. Since it is submersible to 150' you can use it as a range finder while snorkeling and diving.