The wireless sensor uses a transmission frequency of 433.92 MHz;<br> <br> 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);<br> <br> Host temperature measurement range: 0 C (14 F) ~ 60 C (140 F);<br> <br> Host humidity measurement range: 10% RH ~ 99% RH;<br> <br> Sensor temperature measurement range: -40 C (-40 F)~60 C (140 F);<br> <br> Sensor humidity measurement range: 10% RH ~ 99% RH<br> <br> Large LCD Multifunction Weather StationThe weather station uses a large color LCD display, all the 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 the ...