Listen Technologies LS-57-072 - Listen iDSP Advanced Level II Stationary RF System (72 MHz)Perfect for venues with a capacity of up to 100 people, the LS 57 Advanced Level II Stationary RF System broadcasts a strong, reliable RF signal from our LT 800 072 72 MHz transmitter, and four (4) LR 5200 072 Advanced iDSP receivers ensure the best possible listening experience for customers, clients, visitors, and more. Our LR 5200 072 receiver offers listeners exceptional audio performance and clarity thanks to having 20 dB less hiss than other RF