This Is What Your Remote Control Can Do - HomeMatic HM-RC-12-B Operating Manual

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This is what your remote control can do

Hand transmitters and remote controls are used to control the re-
ceivers that they are taught to work with. A single button can be
taught to work with one or more components and address them
all simultaneously. That means that pressing a single button can
execute many different tasks.
A – Operating push-buttons (Button-pairs)
B – Device LED
C – Teach button
D – Battery cover
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