buy the best quality microphone you can afford because you will get better sound
reproduction. There are many different types of microphones. Plastic case microphones
will pick up noise from your hands so it is always better to choose metal cases.
Lapel and headsets are great for trade shows when there is confinement of movement
and cordless and hand helds are ideal for shows.
WARNING: As of - 11th March 2015 it is ILLEGAL to operate wireless microphone systems outside 502-606 MHz and 622-698 MHz.