Becker Centronic EasyControl EC142-II Notice De Montage Et D'utilisation page 30

Channel selection button
Up to 2 channels can be selected using the channel selection button. The individual
channels are indicated by the corresponding channel indicator lamp lighting up. If all
of the channel indicator lamps light up simultaneously, the central command can be
programmed or transmitted.
Channel indicator lamps
A radio signal is indicated by the corresponding channel indicator lamp lighting up.
The respective channel indicator lamp flashes while transmitting if the battery is get-
ting weak. The transmission strength and the radio range decrease as battery power
declines. If the channel indicator lamp no longer lights up when a button is pressed,
the battery must be replaced.
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