Abstract: An electronic security sentry for monitoring a designated area to detect unauthorized intruders comprises a housing that contains a microprocessor controller, a power source, and a two-way radio transmitter coupled to the microprocessor. The microprocessor controller includes storage for storing the digital equivalents of a predetermined set of verbal commands. A set of passive infrared detectors are coupled to the controller and mounted to the housing such that their fields of coverage span the area to be monitored. Upon detection by the sensors of an unauthorized intruder, a signal is conveyed to the microprocessor which selects a predetermined set of digitized verbal commands from its memory, activates the two-way radio in its transmit mode, and conveys the commands in a predetermined sequence to the two-way radio. The sequence of verbal commands are then transmitted by the radio for receipt by the security guards of an adjunct guard force, who can respond to the alarm accordingly.