Sena Bluetooth SMH10R v4.3 User's Guide - Manual (Page 22)

SMH10R
22
A
B D
C
Pairing A & B
4. You can make other pairings between headsets A and C, and
between headsets A and D by following the same procedure
as above.
A A
B B D D
C C
Pairing A & C Pairing A & D
5. The intercom pairing queue is “Last-Come, First-Served”.
If a headset has multiple paired headsets for intercom
conversations, the last paired headset is set as the “first
intercom friend”. The previous intercom friend becomes the
“second intercom friend”, and “third intercom friend”.
Note:
For example, after the pairing procedures listed above, headset D is the first
intercom friend of headset A. Headset C is the second intercom friend of
headset A, and headset B is the third intercom friend of headset A.
9.2 Pairing with Other Sena Headset Models for
Intercom Conversation
The SMH10R can be paired with all other Sena headset models
such as the SPH10 and the SMH5 for intercom conversation.
Please follow the same procedure as above to pair with these
headset models.
Note:
The SMH5 cannot participate in three-way or four-way conference intercom
with the SMH10R. The SMH5 has a limited capability, and can only manage
two-way intercom or with other Sena headset models.