The Fiberplex FAK-2981 is a facility fire alarm kit with an amplified speaker plus a optical receiver and optical transmitter. A complete bundled package for Fire Alarm annuciation applications. Includes warning strobe. The unit can be used in areas of high electrical noise or in and out of RF shielded enclosures. The fiber optic cable is not susceptible to interference caused by impulse noise, crosstalk, or EMI. Privacy of communications is also enhanced because the fiber optic cable does not radiate any emissions. In addition, fiber optic cable offers much longer transmission distances than copper wiring. Multimode optics on the units can extend the distance to 2km.