Williams AV PPA R37 Select Channel FM Receiver With EarphoneThe PPA R37 Select Channel FM Receiver with Earphone from Williams Sound is a compact and easy to use beltpack receiver that allows you to listen to an FM signal in the 72 76MHz band. The receiver offers seek button channel selection between 17 pre set frequencies, which are digitally synthesized for terrific audio clarity and signal stability. It also features a channel lock capability to prevent accidental changes. The receiver has an ergonomic