A:Answer That is a question of the source and not the adapter. For example, if you have an iPhone, it only pairs to 1 device at a time so regardless if I have two of the adapters connected to different speakers, the phone will only transmit to one.
I will caveat that with saying that I do not know of any sources that will connect to multiple BT devices, be it a laptop, phone, tablet, etc.
Hope this helps.
P.s. You can connect to one of these adapters and use an audio jack splitter and an extended cable. Or try RF adapters.