The LEF-3C is a semi-flush mount selective call open voice style master station that supports a maximum capacity of up to 4 stations. Any combination of subs and masters can be used up to its maximum capacity. Unit allows for all call to all stations in the system (requires BG-10C). Incoming calls from a sub or door station sound an electronic tone and light an LED, remaining lit for approximately 20 seconds. Communication at the calling master is press-to-talk, release-to-isten, and is hands free at the responding station. The person at the master station can selectively call and talk with a person at any connected sub or master station in the system. The privacy feature on the master prevents eavesdropping from another master station. An All Call announcement can be made from the master if the system includes the All Call/Chime Adaptor. The LEF-3C flush mounts into a wall. Sub stations are available in surface or flush mount styles, with or without privacy. Outdoor stations are available in surface or flush mount styles.