When the difference between a lights-out day on the water and a hike in the woods comes down to water temperature, the accuracy of your thermometer is crucial. Compact and easy to handle, the Riverkeeper digital fishing thermometer is the only IPX7 submersible-rated digital thermometer designed by and for fly anglers.Specifications and Features: Compact and easy to handle Provides rapid water temperature readings Ultrasonically welded, recycled polycarbonate main body Soft silicone outer case Large backlit ultrasonic polycarbonate screen with a UV filter Replaceable CR2025 battery (1 included) CE-certified and IPX7 submersible rated