A marvel of German craftsmanship, this instrument with smooth Birchwood bezel, measuring 6” in diameter x 1-1/2” front to back, white face plate with easy to read black analog numerals. Separate individual dials record humidity, 0 to 70% (hygrometer) on bottom (humidity should be between 5 and 20 percent and is controlled by amount of water thrown on sauna rocks). Try throwing water on the rocks, a dipper at a timer please until you find the right humidify for you. Keep in mind the higher the temperature in the sauna the lower the humidity should be. The Thermometer is on the top in Fahrenheit, 40 to 240 degrees (Recommended temperature range should be between 170- 190 degrees Fahrenheit). This would be an elegant addition to any sauna.