b) Temperature/air humidity sensor
WIRELESS THERMO HYGRO
1
23 Display of the temperature and air humidity
24 LED (flashes briefly upon data transmission)
25 Battery compartment cover
26 Four screws for the battery compartment cover
27 RESET button
28 Opening for wall-mounting
29 Switch for channel selection (channel 1 to 5)
30 Battery compartment lid (battery compartment for 2*AA size batteries)
66
23
24
25
27
RESET
26
28
29
30