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 equipped with only 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 uses a large color LCD screen, all important information is clear at a glance: indoor temperature and outdoor (Celsius and Fahrenheit)/humidity, maximum/minimum temperature and alarms, weather forecast, comfort, time (12/24 hours), calendar, week (Seven languages to choose), daily alarm and snooze function and switch and moon phase. Temperature and humidity forecast function collect real-time data based on outdoor sensors, and