Depthtrax 1H - Handheld Depth FinderThe DepthTrax 1H is a powerful handheld depth finder, capable of generating immediate and precise depth measurements up to 300 feet, along with temperature readings accurate to the nearest tenth of a degree. Built with durability in mind and completely waterproof, it stands out as the sole handheld SONAR depth finder in the market that boasts these features and that comes with a 2 year warranty.