Sony MHC-V43D Help Manual page 171

Help Guide
Home Audio System
MHC-V43D
The BLUETOOTH device cannot be connected to the system during Wireless Party
Chain function.
After connecting all the systems, perform the pairing and connecting operations between the BLUETOOTH device
and the Party Host.
Related Topic
Enjoying wireless playback using multiple audio systems (Wireless Party Chain function)
Terminating the Wireless Party Chain function
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