Williams AV PPA T27 Compact Base Station FM TransmitterIf you're looking for an FM transmitter to use with your Williams Sound assistive listening device, consider the PPA T27. This compact base station transmitter pairs with Williams Sound PPA R37 or PPA R38 receivers to broadcast clear sound. As long as you have a compatible Williams Sound receiver, you can use this transmitter in movie theaters, classrooms, houses of worship, and more. The transmitter accepts audio via the RCA line input jack or 3. 5mm