Omni SB1 Sound Question

I've replaced my Onkyo 5.1 surround sound system with the Polk Omni SB1 soundbar (rearranged living room and wife wanted something less bulky). I can't find any information about whether or not the SB1 puts our a simulated 5.1 sound, or is it just 2.1? Further, if I were to add two of the Omni wireless speakers to the mix, would those create 5.1 if the SB1 doesn't simulate it?

Any help you folks can offer will be greatly appreciated.

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