Sony MHC-V42D Help Manual page 65

Note
When watching movies using the Wireless Party Chain function, there may be a gap between video and audio.
The Wireless Party Chain function is available only when the system is in BLUETOOTH function.
When you use the Wireless Party Chain function by connecting multiple types of audio systems, the illumination may not work
depending on the order of the systems you connected. In this case, set the system whose illumination does not work as the first
system.
While the Wireless Party Chain function is active, you cannot select another system as a new Party Host.
When you use the microphone or play a guitar on the Party Host, the sound is not output from the Party Guests.
Sleep Timer and the Auto Standby function do not work on the Party Guests.
Related Topic
Terminating the Wireless Party Chain function
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