Cardo Systems FREECOM 4x Manual page 18

Press for 5 seconds. The LED flashes red
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Tap once . The LED flashes blue.
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The following announcement is heard: Rider B pairing.
Bluetooth intercom pairing needs to be initiated on the other device.
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4. To add a 4th rider, Rider 1 or Rider 2 connects to the additional rider.
To pair a non-Cardo Bluetooth intercom group unit:
The non-Cardo unit should be on phone pairing mode.
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All the steps are the same as with a Cardo Bluetooth intercom group.
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