HumanTechnik signolux A-2659-0 Mode D'emploi page 14

Mounting the doorbell-pushbutton
You can mount the pushbutton using the supplied
strips of double-sided tape. Take care to adhere it to a
smooth, dry and clean surface.
Important note:
Kindly keep in mind that metal parts and other
building materials may interfere with the transmission
of the radio signal. As they can be either visible or
hidden at the desired mounting location you should
always carry out a functional test at the mounting
location before starting the mounting process, and, if
required, choose a different mounting or installation
location if the reception is not guaranteed.
Specifications
Work range
Radio frequency
Range (open spaces)
Transmission power
Battery
Battery service life
(5 activations per day)
Dimensions (HxWxD)
Weight
14 English
-10 to 40°C
868,425 MHz
up to 200 m
<10 mW
CR2032
18 months
40 x 80 x 16 mm
41 g