Function overview: 1.LCD display 2. Dimensions 48 x 28.6 x 15.2mm (measurement has a small error) 3.LCD size: 35.7 x 16.8mm (measurement has a small error) 4. Weight: 25g (with 2 batteries) 5. Humidity display 6. Humidity measurement range 10% - 99% 7. Humidity display resolution 1% 8. Humidity sampling period is 10 seconds (1 minute) 9. Humidity measurement accuracy andplusmn;5% 10. Rated voltage DC1.5v (2 AG13 button batteries) 11. Temperature measurement range -50 to 70 12. Temperature measurement accuracy andplusmn;1 degree (under normal temperature) Specifications: Battery installation: Flip over to the back of this product; Push open the battery cover in the direction indicated by arrow Pi; Put two LR44 button batteries in the battery compartment Installation and operation Embedded installation Electronic products have errors. Do not buy those with high requirements. The humidity of the product at room temperature is about plus or minus 5%, and the temperature is about plus or minus 1 degree. Package Included: 1 x Mini temperature and humidity