Listen Technologies LA-141 - ListenIR Expansion Radiator for LT-84The LA 141 Expansion Radiator (Pat. 9,712,246) from Listen Technologies expands on the functionality and coverage area of the LT 84 Infrared Transmitter Radiator combo system, giving users and clients an uninterrupted, high performance listening experience. Up to four (4) LA 141 Expansion Radiators can be added to the LT 84 system, providing additional coverage up to 2,787 m2 (30,000 ft2) with LR 4200 IR LR 5200 IR receivers or 697 m2 (7,500 ft2) with