Angus Young uses this wireless unit on the rock or bust tour.
According to [this](http://www.guitargeek.com/dave-mustaine-megadeth-2004-guitar-rig-and-gear-setup-diagram/) Guitar Geek rig diagram, Dave uses Shure SLX3 wireless units.
Indeed I have the wireless instrument system as well as this one, for my Wireless SM58 Vocal mic. Renowned SM58 sound and reliability, without the limits of cables.
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