Fellow speaker,
If you move about in your speech and need to have your hands free you need a lapel mike. If possible, get a separate platform away from the head table. Lapel mikes give a constant sound level but require you to be aware of what you wear...not all clothing goes well with using lapel mikes. The downside is lapel mikes can sometimes pick up clanking sounds from jewelry or noises from clothing rubbing together.
Lapelling,
Tim
