eXtreme Radio Service

eXtreme Radio Service (eXRS) is a proprietary personal communication technology marketed by TriSquare in the United States.

Since the frequency in use is rapidly changed in a pattern defined by the channel number, transmissions cannot be monitored by commercially available radio scanners.

TriSquare claims that reliable communications can be maintained with up to 100,000 users in range of each other.

The range of the eXRS radios is not explicitly stated, however, the manufacturer claims that it is equal to or greater than FRS and GMRS.

No license is needed to operate the radios for personal or commercial use, and despite the name's similarity to the FRS allocation, the system is a proprietary design using a license free Part 15 band, rather than an official U.S. Federal Communications Commission (FCC) allocated service.