Externally powered Remote Transceiver Line Extender. Used in-line between single Tempest BaseStations and the Remote Transceivers to extend to distances up to 4500 feet. (1372 m). Up to three RT Line Extenders may be inserted between a BaseStation and Remote Transceiver for a maximum total line length of up to 7500 ft (2286 m). For use with either 900MHz (North America, Australia & New Zealand Only) or 2.4GHz systems.