The wireless sensor uses a transmission frequency of 433.92 MHz; A host can connect up to 3 wireless sensors at the same time (a host is only equipped with one only transmitter, if you want to realize this function, you need to purchase additional sensors); Host temperature measurement range: 0C (14F) ~ 60C (140F); Host humidity measurement range: 10%RH~99%RH; Sensor temperature measurement range: -40C (-40F)~60C (140F); Sensor Humidity Measurement Range: 10% RH ~ 99% RH Large LCD Screen Multifunction Weather Station: The weather station uses a large color LCD screen, all important information is clear at a glance: indoor and outdoor temperature (Celsius and Fahrenheit)/humidity, maximum/minimum temperature and alarms, expected weather, comfort, time (12 /24 hours), calendar, week( Seven languages to choose), daily alarm and snooze function and switch and moon phase.< /p> Temperature And Humidity Forecast Function: Collect data in real-time based on outdoor sensors, then track related variables based on the Indoor Outdoor Wireless Sensor, including changes in temperature, humidity, and air pressure, to generate more accurate information for your location. Radio weather station with 2 outdoor sensors: The weather station can display real-time weather of up to 2 wireless sensor channels at the same time; the wireless range of the remote sensor is up to 60m; you can not only put them in a room or basement, but also put them outside.At the same time, the display has a built-in sensor, which you can use to detect temperature data and indoor humidity levels. Two Power Modes: Thermometer Hygrometer is powered by adapter (included) or AA batteries (not included). When using the battery, the screen will automatically turn off after approximately 15 seconds to save power. If you use the AC adapter, the screen stays on. At the same time, when you are running on battery power, the screen will automatically touch memory mode and automatically save all the content you activate. Your Personal Weather Assistant: Our indoor weather station is different from the weather forecast you see on TV or the internet. Metrology products have separate sensors that can collect real-time data externally. > Size: 172*132*23mm Scope of delivery: One piece