Here is some very general info, however for more detailed info, I need more information on what your using it for. Speechs, Play, Vocals, Bands? Inside or Outside venue?

For Vocals you should have no problems with a Wireless Handheld SM58, they work over a large range, however still have a limit. Make sure the receivers are always close enough to the mics to hold a reliable connection.

Wireless Lapel Mics (Clip-on) are more troublesome, as they are generally consenser mics which are more susceptible to feedback. You also need to place them somewhere in range of the person's mouth, whist avoiding placing somewhere where you will get alot of fabric movement whist moving around, or you will hear that very loudly FOH. You also need to deal with body-packs and wires.

Leturn mics are generally easier to deal with than Lapel, however again are Condenser and more feedback prone.

I would reccomend the SM58 where possible, as it is much easier to work with, and you are more likely to get a better sound with less work.