The eXRS (eXtreme Radio Service) is the new two-way radio system from TriSquare that uses proprietary Frequency Hopping Spread Spectrum (FHSS) technology to provide private and secure communications. TriSquare offers two models of eXRS radios. The full featured model, the TSX300, provides advanced features such as text messaging, caller ID, and wireless cloning. The TSX300 has 10 billion channels available to the user, so busy channels in crowded areas are a thing of the past. The lower cost TSX100 gives users the eXRS benefits of secure and interference-free communications without the advanced features of the TSX300. The TSX100 has 1,000 channels and is compatible with the TSX300 on those channels. The TSX100 and TSX300 have phone book-style contact lists for storing other users' information, as well as extended battery life, call signaling and VOX operation.