Listen Technologies LS-70-216 iDSP Stationary RF SystemThe LS 70 Stationary RF System from Listen Technologies is an ideal way to provide assistive listening in larger venues as quickly as possible. Offering coverage up to 914. 4 m (3,000 ft.), the complete package includes our LT 800 216 Stationary RF transmitter and four of our best in class LR 4200 216 iDSP receivers, as well as everything else you need to get set up immediately. The LS 70 system also includes our LA 381 Intelligent 12 unit charging