The Personal PA® 377 large area listening system features push button menu controls that make the system easy to setup and use. This complete turnkey solution includes four PPA Select™ receivers, each featuring seek-button channel selection with access to 17 pre-set wideband frequencies between 72-76MHz. The system is expandable to accommodate any number of listeners. The PPA 377 meets ADA (Americans with Disabilities Act) requirements. Five year warranty. Ninety day warranty on accessories.