The Williams Sound FM 558-12 PRO is an FM+ large-area dual FM and Wi-Fi assistive listening system that comes with an FM T55 transmitter, 12 FM R38 receivers, 12 earphones, 3 neckloops, a 12-bay charger, rechargeable batteries, a remote coaxial antenna, an ADA wall plaque and a rack panel kit for professional installation.

• 16-bit DAC provides a 48Khz sample rate
• 10 segment LED bar graph
• Adjustable RF power output
• Professional DSP audio platform
• Features coaxial cable and rack panel kit for professional installation
• Audio presets - hearing assistance, music, voice, and custom
• Professional audio inputs: 1/4"/XLR, phantom power, line-level output jack
• Supports 45 users in unicast mode or 1500+ users in multicast mode
• Single-channel audio streaming over Wi-Fi
• Up to 1000 foot operating range
• Includes 12 FM R38 receivers
• Works with existing Williams Sound FM receivers
• Works with free WaveCAST iOS or Android apps
• 2-year warranty

• (1) FM T55 Transmitter
• (12) PPA R38N Receivers
• (12) EAR 022 Surround Earphones
• (3) NKL 001 Neckloops
• (1) CHG 3512 12-Bay Charger
• (12) BAT 026-2 AA NiMH Rechargeable Batteries
• (1) ANT 005 Remote Coaxial Antenna
• (1) IDP 008 ADA Wall Plaque
• (1) RPK 005 Rack Panel Kit