Williams AV PPA T27 Personal PA Assistive Listening TransmitterThe PPA T27 transmitter broadcasts a speaker's voice, music program or audio service wirelessly up to 1000 feet to a listening audience. Audience participants can use an optional R37, R38 or any FM receiver operating on the 72 76 MHz frequency to pick up the broadcast. The speaker simply connects a microphone with a 3. 5mm plug into the unit to broadcast their voice. Unit also can connect to a sound system through a line level (RCA) jack to broadcast