1.LCD screen 2. overall size: 47.6*28.4*15.5mm Recessed opening size: 44.3*25.3mm 3. LCD screen size: 40*22.5mm 4. weight : 45g 5. temperature display 8. default (can choose ). 9.Temperature measurement range -50~70 Humidity measurement range: 20%~90%. 10.Temperature display resolution 0.1(0.2) Humidity display resolution: 1%. 11.temperature and humidity sampling period 10 seconds (1 minute) 12.temperature measurement accuracy 1 Accuracy of humidity measurement 5%. Temperature and humidity are outside the range of values, causing the temperature to rise or fall and moisture. 14.Rated voltage DC1.5v 15.Detection line 1.5m line II. Installing the battery Turn the product upside down; Open the battery cover in the direction indicated by the arrow; Note: Place two LR44 (or AG13) button batteries in the battery compartment (not included).