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Motion detectors suggestion with battery alive message

Posted: 08 Nov 2016, 12:46
by pacitzu
I saw the list of motion detectors compatible with RFLink but do not know which one to buy. What do you recommend?
I would appreciate that the device periodically send the message that the battery is alive.
I tried the Marmitek MS90 and it seems to me valid.
There are cheaper alternatives?
Thank you