Flexible and simple. The PPA Select FM receiver features easy-to-use, seek-button channel selection with access to 17 pre-set wideband frequencies between 72-76 MHz. Compatible with Williams Sound 72-76 MHz transmitters: PPA T46, PPA T45, PPA T45NET, PPA T27. Digitally synthesized for even greater audio clarity and stability. A versatile 3.5mm stereo/mono jack allows for a variety of earphone and headphone options, and is neckloop/telecoil-equipped-hearing-aid compatible.