La Crosse Technology WIRELESS 433 MHZ WS-7391U - Manual (Page 6)

6
To complete the set up of your indoor weather station
after the 10 minutes have passed please follow the
steps in the Detailed Set Up Guide
.
Note: The remote thermo/hygro sensor transmits a signal every 3
minutes; after the batteries have been installed, the indoor weather
station will search for the signal for a duration of 5 minutes. If
there is no temperature reading in the OUTDOOR LCD after 5
minutes, make sure the units are within range of each other, or
repeat the battery installation procedure.