A combination of three measurement tools in one: the sauna hygrometer thermometer is an ideal tool for checking humidity and temperature in sauna rooms. The hourglass has a clear, easy-to-read 15-minute scale and precise timing function. Very suitable for the functions required in a sauna room. The digital value is accurate: the sauna hygrometer thermometers have reliable measurement values and can control humidity and temperature to create a climate comfortable and healthy interior, especially suitable for use in the living room and office! Diameter of the hygrometer: 10cm, measuring range temperature: 20-120°C, measuring range humidity: 0-100%. Sauna hygrometer thermometers with hourglass: The hourglass lasts 15 minutes and has a 360° rotating frame on the back. This is when you usually use the sauna. It also includes 5-minute and 10-minute entrance panels, which can meet your shorter time requirements (15 minutes for hourglass sauna accessories + 2 stainless steel screws)