ENDURANCE 85 COMFORTMETER The Endurance Comfortmeter displays both temperature and humidity on the dial showing conditions that are ideally "comfortable." The thermometer displays temperature in both Fahrenheit and Celsius on the left scale, and the hygrometer shows percentage of relative humidity on the right. The Endurance comfortmeter is part of an extensive line of nautical instruments that feature several remarkable benefits. All instruments in the Endurance Collection have a maintenance-free, ultra-hard finish guaranteed to NEVER tarnish. The patented Slide-n-Lock Mounting System eliminates the need for visible mounting screws and allows for easy removal for necessary adjustments. This brass Endurance Comfortmeter is weatherproof and designed for outdoor use. •Beveled glass crystal •O-ring seated behind glass for weatherproof construction •Lifetime warranty on finish and movement •United States Patent #7,293,456