The brass Endurance Comfortmeter displays both temperature and humidity on a generous size dial showing conditions that are ideally comfortable. The thermometer displays temperature in both Fahrenheit and Celsius on the left scale and the hygrometer shows of relative humidity on the right. This thermometer hygrometer is weatherproof and designed for outdoor use. It is part of the Endurance Collection which is an extensive line of nautical instruments that feature several remarkable benefits. All instruments in the Endurance Collection have a maintenance-free ultra-hard finish d to NEVER tarnish. The patented Slide-n-Lock Mounting System eliminates the need for visible mounting screws and is easily removed for necessary adjustments.