The wireless sensor uses a transmission frequency of 433.92 MHz; One host can connect up to 3 wireless sensors at the same time (one host is not only equipped with one transmitter, if you want to realize this function, you need to purchase additional sensors); Host temperature measurement range: 0°C (14°F) ~ 60 °C (140 °F); Host humidity measurement range: 10% RH ~ 99% RH; Sensor temperature measurement range: -40 °C (-40 °F). )~60°C (140°F); Sensor humidity measurement range: 10% RH ~ 99% RH 【Multifunctional Weather Station with Large LCD Screen】The weather station features 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, weather forecast, comfort, time (12/24 hours), calendar, week (seven languages to choose from), daily alarm and snooze function, and toggle and phase moon. 【Temperature and Humidity Forecast Function】Collect real-time data based on