SonicLink is a new generation of conference microphones. SonicLink consists of a number of microphines mounted at the ceiling (like lights or smoke sensors) and a processing unit, which can be connected directly to your mixer via mono/stereo output.
This system is able to pick up sound from a narrow beam at any given direction — that means it picks up the speech from a single given person, and no matter how noisy it is in the hall, the sound will be clean — much cleaner than you can get with a usual wireess microphone. And you don't even have to give any microphone to a speaker — all he or she has to do is just start speaking. SonicLink will do the rest of the job.
You could not wish for a better sollution for your conference!