Listen Technologies LS-55-216 iDSP Stationary RF SystemPerfect for larger venues requiring more range, the LS 55 Stationary RF System utilizes a LT 800 216 RF Transmitter and universal antenna kit to provide ample coverage. Complete with four LR 4200 216 iDSP RF receivers, universal ear speakers, and more, you can begin offering high performance assistive listening services right away. The LS 55 system also includes our LA 381 Drop in Charging Dispensing Station, with room for charging, storing, and