http://www.amazon.com/gp/aw/d/B0067R9FCY/ref=mp_s_a_1_1?qid=1432607702&sr=8-1&pi=AC_SY200_QL40&keywords=technical+pro+wireless+microphone&dpPl=1&dpID=41xrQUolJAL&ref=plSrch

I use these they work pretty good and don't cost much to replace should some clever person do a mic drop. Just make sure you get those foam cover things they are sensitive and pick up a lot of breathing noise.