The Telex RadioCom models BTR-300 is specifically designed to provide the user with a highly flexible wireless two-way communication system with the capability to interface with a wired intercom system and other auxiliary audio. At the BTR-300 operator?s command, the remotes may communicate with each other, with a wired intercom system or with an auxiliary system. The system operates on selected frequencies within the 150-216 MHz band. The BTR-300 system is fully compatible with a number of other wired intercom manufacturers units.