Very reliable - The hygrometer and thermometer with reliable measurement allows to control humidity and temperature for a comfortable and healthy indoor climate - Particularly suitable for use in living rooms and offices (not suitable for saunas)! Ready to use - The device is factory calibrated and ready for immediate use. If necessary, it can be fine-tuned using the screws. The device comes with detailed operating instructions. Very high quality - The entire housing, including the removable bracket, is made of high-quality stainless steel, the dial is carefully made of high-quality aluminum - rust-proof, very strong, durable, decorative and has an elegant feel! Clear - Humidity and temperature are displayed in a similar way and are easy to read on the 25 cm display - The comfort zones are color-coded and indicate when ventilation or humidity should be increased! Sustainable - In contrast to digital devices, our hydrometers do not require batteries or liquid substances to operate, which protects our environment and saves you subsequent costs! Specifications: Temperature measurement range: -40℃60℃(±2℃) Humidity measurement range: 0 RH, Accuracy: +/- 5% RH (40 70% RH) Material: Aluminum alloy outer ring and aluminum alloy small shell, PVC film dial, aluminum pointer, plastic lens Diameter: 25 cm Color: Black Quantity: 1 piece Note: 1. Please allow 0-1 cm error due to manual measurement. Please make sure you do not mind before bidding. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package List: 1 x Thermometer and Hygrometer