【Smart Bluetooth-compatible Connectivity】Equipped with Bluetooth-compatible 5.0 technology for seamless connection and data transmission to your smart devices. 【Accurate Temperature and Humidity Monitoring】Precise sensors provide real-time temperature and humidity readings for optimal environmental control. 【Compact and Versatile Design】With a sleek 43*43*10 mm size, this device fits perfectly in any room or space. 【Wide Operating Range】Functions effectively in temperatures from -10℃ to 40℃ and humidity levels between 10% to 90% RH. 【Magnetic Attachment】No need for screws or complicated mounting. This device features a strong built-in magnet, allowing it to attach effortlessly to refrigerators, metal shelves, or any magnetic surface. Specifications: Power mode: CR2032 battery (included) Rated Voltage: 3V Operating Temperature: -10 to 40℃ Working humidity: 10%-90% RH Product Size: 43*43*10mm