C/F indoor/outdoor temperature and relative humidity display.
 Max/Min indoor/outdoor temperature and relative humidity display
 Indoor temperature measure range:-50℃~+70℃ (-58F+158F)
 outdoor temperature measure range:-50℃~+70℃(-58F+158F )
 Temperature resolution:0.1℃ / Temperature accuracy:±1℃
 Humidity measure range:20%~90%RH
 Humidity resolution:1%