Abstract: A system for communicating information to a person in a local area. The system includes a device arranged noticeable by the person and a power source arranged to power the device. The system further includes a relay arranged in-between the power source and the device, and a control unit arranged to generate a control signal in response to an event. The relay is arranged to connect the device to the power source in absence of the control signal, and to temporarily disconnect the device from the power source in response to the control signal generated by the control unit, thereby communicating the information to the person.