My wedding ceremony microphone sound system will allow your guests to hear your officiant during your wedding ceremony. Extra microphones can be used so that the guests can also hear the two of you receite your vows to each other. A wireless microphone on a stand is a good idea if you will have somebody doing a reading. Live musicians can also be amplified which is a good idea if the wedding ceremony is outside. Rates start at $200 for 1 speaker, 1 mixer and 1 lavalier (tie-clip) microphone for the officiant.
Extra microphones (hand held or lavalier) are $100 each.
I also run all the microphones during the ceremony.