I have a Shure PGX receiver and wireless hand held mic:

Is it possible to just buy the H20 wireless headset and adapter to go along wiht this?

Or any other suggestions?

Thanks
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Yamaha 920 / Yamaha Stagepas 100 BTRs / Senn e935 - LIVE
Roland RD 2000 / Tascam DP24sd / ATEM switcher - STUDIO