REMEHA iSense Guide D'utilisation page 49

 Sense RF wireless range
The range of the iSense RF in buildings is generally 30 metres.
Note!
EN
This value is purely an indication. The actual range of the RF signal depends strongly on the local
environment. Remember that the number of walls and ceilings (metal or otherwise) can have a
(considerable) impact on reception. Other objects that contain metal may also impact reception.
These include mirrors and windows with a metal coating, insulating films etc.
The signal strength can be viewed via Menu > Information.
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