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I. Function Overview: 1.LCD display 2. Product size: 45*14mm 3. Material: rubber shell ABS 4. Humidity display 5. The humidity measurement range is 20% ~ 90% 6. The humidity display resolution is 1% 7. Humidity sampling period 10 seconds (1 minute) 8. Humidity measurement accuracy ±5% 9. Rated voltage DC1.5v (1 AG13 button battery) 10. Temperature measurement range: -50 ~ 70℃ 11. Measurement error: ±1℃ 12. Working principle: Thermistor conversion temperature display Ii. Battery installation Flip to the back of the product Push the battery cover open in the direction indicated by the arrow Put one LR44 button battery into the battery slot Note: This product does not come with batteries, must be purchased by oneself