Disclosed is a handheld wireless device which works in cooperation with a facility system. The system includes a first network device. This first network device includes a webserver and a database on a network. A second network device is also included in the network. This second device includes a microcontroller. The microcontroller is adapted to receive commands from an application running on the webserver, and cause a switch device to control a facility public-address system in response to said first command. The system also includes an I/O controller. This I/O controller receives commands from the microcontroller to control the facilities hardware systems. With respect to hardware systems, the device may interact with the facilities HVAC system, lighting systems, door and locker locks, etc. With respect to the facilities communications systems, the device is able to interface with the buildings alarms, public-address systems, and bell systems.