1. Temperature: The default temperature unit when installing the battery is ; 2. In normal mode, [] briefly to switch the temperature between Fahrenheit and Celsius; 3. Temperature measurement range: - 9.9 -60 (14.2 -140 ); (When the temperature is low LL is always displayed at - 9.9 L; When the temperature is higher than 60 , . H is always displayed; 4. Temperature measurement error: 1 (0 -40 ), 2 (40 -60 ) 5. Temperature accuracy: 0.1 ; 6. Detection cycle: 120 seconds; 7. Humidity measurement range: 0%-99% RH; (When the humidity is lower than 0%, it is always displayed 0%; Above 99%, it always shows 99%) 8. Humidity measurement error: 5% rh (15 ~ 40 , 40 ~ 80 ); 9. Detection cycle: 120 seconds; 10. /24Hr; AM/PM sign display in 12 hour system 11. Briefly the [] touch key to turn on the backlight for 10s and then it turn off automatically. 12. APP download and installation [Tuya Smart APP] Colour:White Material:plastic Package Contents: 1 x Temperature & Humidity Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.