ProductFunction:The main function1. Display of temperature and humidity interior and exterior;* Indoor temperature range: -10 ~ 50;* Outdoor temperature range (referring to sensor): -40C ~ 60C.*Humidity range indoor and outdoor: 1% ~ 99%2. Records maximum and minimum temperature and humidity values internal and external (can be erased manually and automatically erased at 00:00 each day);3. Temperature and humidity trends interior and exterior;4. Atmospheric pressure and weather forecasts for the next 12 to 12 months. 24 hours (the forecast accuracy rate is about 70%);5. Radio time and perpetual calendar (12/24 hours optional);6. Alarm and snooze function (5 minutes);7. There are seven language options for weekly spelling: UK, France, Germany, Italy, Spain, Netherlands, Denmark;8. Four sets of temperature and humidity data are displayed on the same screen;9. Interior comfort index at three levels;10. The host is equipped with three sensors (the package contains 3);11. Five brightness levels backlight ;12. The tone keys can be enabled or disabled;13. Low battery prompt for host and sensor.feature:Current source:Host: Equipped European standard AC power supply/American standard AC power supply; 3 AAA batteries can be used for memory function or remote use. short term (not included in delivery, the screen only lights up for 15 seconds with batteries);Sensor: 2 AA*3 batteries (not included in delivery).Transmission gauge:Color box: color box 195x65x125mmThe gross weight of each is approximately 490GTechnical parameters1. Indoor temperature measuring range: -10C to 50 C;2. Outdoor temperature measurement range: -40C to 60C3. Humidity measuring range interior: 1% to 1% 99% RH;4. Humidity measuring range external: 1% to 1% 99% RH;5. The effective connection distance of the sensor: 100 meters in an open environment;packing list:* a host*Three sensors;*A European fire bull;*Manual in five languages: English, French, German, Italian and Spanish.Main points:1. The product size is measured manually, there may be errors2. Given As different monitors display different colors, please refer to the instructions below. the actual color you received.3. Please confirm the size before purchasing.