The 4-Channel, 48-Listener Stationary IR System delivers clear audio from four audio sources to 48 listeners with consistent great sound and substantial signal coverage. Includes transmitter and radiator mounting hardware, rechargeable batteries and charging stations. It is designed for delivering multi-channel audio in applications such as language interpretation, houses of worship, courtrooms, secure rooms, and for auditory description. It includes four Stationary IR Transmitters and 48 stetho receivers, NiMH rechargeable battery packs and six charging station. The system can operate between one and four channels of audio and can cover up to 80,000 square feet. Listen�s IR systems are designed for applications that require the audio signal to be isolated for security or other reasons, such. Custom systems available.