Extremely Reliable - This hygrometer and thermometer offers reliable measurement for controlling humidity and temperature, creating a comfortable and healthy indoor climate. It's 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. Fine adjustments can be made using the screws if necessary. Detailed operating instructions are included with the device. Extremely High-Quality - The entire housing, including the removable bracket, is made of high-quality stainless steel, and the dial is crafted from high-quality aluminum. This makes it rust-proof, extremely robust, durable, decorative, and elegant! Clear - Humidity and temperature are displayed similarly and are easy to read on the 25 cm display. The comfort zone is color-coded and indicates when ventilation or humidity increase should be initiated. Sustainable - Compared to digital devices, our hydrometers operate without batteries or liquids, which protects the environment and saves you ongoing 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. Due to manual measurement, please allow 0-1 cm error. 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