1~10PCS 70C Mini LCD Digital Thermometer Hygrometer Round Temperature Humidity Tester Sensor Detector For Freezer Cigar Box Functional Overview: 1. LCD display 2. The opening size is 41mm in diameter (the measurement has a small error) 3. Overall diameter 45.2mm (the measurement has a small error) 4. Humidity display 5. Humidity measurement range 10%99% 6. Humidity display resolution 1% 7. The humidity sampling cycle is 10 seconds (1 minute) 8. Humidity measurement accuracy 5% 9. Rated DC1.5v (1 AG13 button battery) 10. Temperature measurement range -50 to 70 11. Temperature measurement accuracy 1 degree (under normal temperature) Battery installation: Flip to the back of this product; Push open the battery cover in the direction indicated by the arrow Pi; Put two LR44 button batteries into the battery slot Specifications: Specification: Net weight:16.8g Size:4.5*4.5*1.5cm Color:white,black,blue,yellow,red,green Material: Acrylic LCD Package Included: 1*thermometerWith 1 battery