I. Functional Overview:1. LCD Display2. Opening Diameter: 41mm (Small measurement error allowed)3. Dimensions: 45.2mm (Small measurement error allowed)4. Weight: 25g (excluding batteries)5. Humidity Display6. Humidity Measurement Range: 10%～99%7. Humidity Display Resolution: 1%8. Humidity Sampling Cycle: 10 seconds (1 minute)9. Humidity Measurement Accuracy: ±5%10. Rated Voltage: DC 1.5V (1 AG13 button cell battery)11. Temperature Measurement Range: -10 to 50°C12. Temperature Measurement Accuracy: ±1 degree Celsius (at room temperature)II. Battery InstallationFlip the product over to the back;Push open the battery cover in the direction indicated by arrow Pi;Insert two LR44 button cells into the battery slot (batteries not included)The product's humidity tolerance is approximately ±5% and temperature tolerance is approximately ±1 degree Celsius at room temperature.III. Installation and Operation1. Embedded InstallationIV. Packing List2* Round Embedded Digital ThermohygrometerElectronic products may have measurement errors. If you cannot accept that the product may have slight differences due to manual measurement, please consider carefully before purchasing! Thank you for your understanding!