Williams AV FM 558-24 Large-Area Dual FM/Wi-Fi Assist Listen Syst:24 FM R38 R/FM T55/24 Pppa R38N/24 Ear 022The personal FM 558 Plus assisted listening system now with integrated Wi Fi has replaced the existing 558 systems for public venues. With an operating range up to 1000 feet, the FM Plus 558 is ideal for large venues where superior coverage and an OLED user interface where a higher feature set and visibility is required. It includes eight preconfigurable frequency allocated channels for simultaneous use. This complete turnkey solution includes four