Federal Signal's SelectFone Intercom and Paging stations, Models SF–1231X and SF–1235X, are designed for wall mounted installation indoors in hazardous locations.

This intercom is available in single channel (SF–1231X) and five channel (SF–1235X) versions. The SF–1231X and SF–1235X are rated for Class I, Division 2, Groups A, B, C, D; Class II, Division 2, Groups F & G; and Class III environments.