Features: Engineered with a heat resistant aluminum frame and glass lens, this wall mounted sauna thermometers hygrometer delivers precise temperature and humidity readings without requiring batteries or electrical power. Featuring a corrosions resistant mechanical design with oversized analog dials, this sauna room accessory combines clear visibility with space saving wall installation for continuous environmental monitoring. Ideal for sauna owners, spa operators, and wellness enthusiasts seeking reliabled climate control solution in steam rooms. Perfectly suited for residential home saunas, commercial gym steam chambers, or outdoor barrels styles heat units requiring accurate environmental tracking. Its maintenance less mechanical operations ensures years of dependable performances in high humidity environments, making it essential sauna room accessory for safety conscious users. Specifications: Component: Aluminum frame Diameter size: 100mm/3.93inch Temperature ranging: 20℃～120℃/70℉~250℉ Temperature accuracy: ±2℃/±4℉ Scope of application: Can be used for temperature and humidity measurement in sauna and sweat room. Package Includes: 1pcs Temperature Humidity Gauge note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.