I tried google and amazon searches but could not find a "splitter".

If any one has some links for this, I would like to know how this really works.

https://www.amazon.com/Bluetooth-Transmitter-Receiver-Wireless-Projector/dp/B09JNK2MKX/ref=sr_1_2_sspa

This device does NOT call itself a splitter, but an amazon search brought this up. ( why ??)