It's not clear if the "transmitter only option" is an option you specify at purchase or if it's included.

You cannot rely on wireless to be synchronized. I think this would be more audible with bass, say a sub, than surround speakers. You can reduce latency by locating the transmitter so it is within line of sight of the speakers.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated