Sony AIR-SA20PK Operating Instructions (AIRSA15R) Operating Instructions Manual page 19

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Confirm.the.connection.status.
Once the connection between
the main unit and the sub units is
established, the S-AIR indicators on
the sub units light up and "LINKED"
appears in the displays of the sub
units for about 2 seconds.
Tip
Up to 10 sub units (sold separately) can be
connected with the main unit.
Identifying the main unit with
a specific sub unit (Pairing
operation)
It is easy to set the same S-AIR ID for the
main unit and the sub units to establish
the connection.
However, if a neighbor has an S-AIR
main unit with the same S-AIR ID as
your S-AIR main unit, you may be able
to hear the audio transmitted from your
neighbor's S-AIR main unit on your
system. To prevent this, you can identify
the main unit with a specific sub unit by
performing the pairing operation.
Before pairing
The connection is established by the S-
AIR ID (example).
Your system
Main unit
ID A
ID A
Sub unit 
After pairing
The connection is established between
the paired main unit and sub unit.
Your system
Main unit
ID A
ID A
Sub unit 
Pairing
Neighboring
system
ID A
Sub unit 
Neighboring
system
ID A
Sub unit 

Continued
1
GB