Light, strong and durable, the brass Endurance II 105 Comfortmeter monitors both temperature and humidity either indoors or outdoors. This compact instrument is designed to indicate perfect comfort conditions when both hands cross in a limited area of the dial called the COMFORT Zone. The thermometer on the left side of the dial displays the temperature in both Fahrenheit and Celsius. The hygrometer shows percentage of relative humidity on the right. This porthole style instrument is weather resistant and guaranteed to never tarnish.