General information about WiSA:

WiSA is a wireless system designed specifically for audio and speakers. An audio system that incorporates WiSA technology has it's own internal wireless system. It is capable of doing 96kHz/24bit audio with an audio latency of only 5ms, virtually undetectable by the human ear.

For more information on WiSA technology, please go to the official WiSA website.

If a product is WiSA Certified, it can be used with any other WiSA certified product. For example a WiSA Ready TV with at transmitter.
Note: The overall sound quality is dependent on the processing and setup in the WiSA TV & transmitter, and may result in a performance (EQ, crossover and levels) not intended by the speaker manufacturer. To be sure that the Citation products sound the best, use a Citation Bar product as the main "hub".

WiSA Certified products:

Harman Kardon Citation Surrounds
Harman Kardon Citation Sub
Harman Kardon Citation Sub S
Harman Kardon Citation Towers

Products making use of WiSA technology (not certified):

Harman Kardon Citation Bar
Harman Kardon Citation Multibeam 700
Harman Kardon Citation Multibeam 1100
Harman Kardon Citation Amp
Harman Kardon Surround

Limitations:

WiSA does not offer 3D audio formats like Dolby Atmos, and DTS:X yet, so at the moment it is limited to 5.1 or 7.1 Dolby Digital. So regardless of which brand of WiSA speaker you choose, Dolby Atmos will not be available yet.