Homdox Weather Station Forecaster Wireless Temperature Thermometer Outdoor/Indoor Humidity Monitor Long Range MORE MULTIFUNCTION:Measures indoor temperature (Fahrenheit or Celsius) and humidityClock display MORE DATE RECORD:Digital thermometer hygrometer displays high and low temperature & humidity records MORE CONVENIENCE:with an outdoor transmitter and indoor receiver, no need to go outside MORE FAST TRANSMISSION:Strong signal penetration (enhanced 433 MHz)The valid distance for the transmitter and local machine is 30M MORE GUARANTEES:We offer 100% replacement or money-back guarantee,The customers satisfaction is the perpetual pursuit of Homdox