Williams AV PPA R37N PPA Select FM ReceiverFlexible 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 the following Williams Sound transmitters: PPA T35, PPA T27, PPA T32 and PPA T36. 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