Marathons indoor jumbo display wall mountable hygrometer will accurately measure a rooms temperature as well as humidity. It features a full calendar display visualising the day-of-the-week, hour, minute, and seconds. The hygrometer can be formatted to display either 12 or 24-hour time formats and has a time accuracy average within 60 seconds per month. The operating temperature of the device is from 0C to 50C (32F to 122F) and measures temperature within the range of -50C to 70C (-58F to 158F). Marathons hygrometer has a temperature resolution of 0.1C (0.2F) and measuring range from 20% - 90%.