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Call Unit batteries, which have a life
expectancy of approx. 9 months - 3 years depending on usage and type, are
automatically monitored for 'battery low'. When this occurs, a signal is
sent to the Main Panel. The Call Unit number appears on this display with no
sounder.
In a room with more than one
transmitter, i.e. a bedroom with en-suite, the reassurance light on the Call
Unit will be permanently illuminated, to give easy recognition of which unit
requires a new battery.
Under 'low battery' conditions, a Call
Unit will still function for up to 5 days. Replacing batteries is a simple
procedure; the same as that for replacing batteries in a radio.
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