The wall-mounted sounder / strobe is installed in exactly the same manner as an intelligent fire detector. A separate, common installation base which accepts any product within Honeywell Morley-IAS audiable-visual product family, is installed at first fix. This common base is fitted with a shorting spring, enabling loop continuity to be maintained without having to install any audible-visual product. It also removes the need to separately test the wiring. As the strobe itself does not have to be installed until final commissioning, there is no risk of damage during the first fix. By utilizing the latest developments in piezoelectric transducer and high output LED array technology, the sounder / strobe is highly efficient. Current consumption is minimized, enabling the maximum number of devices to be installed on a loop, without compromising on sound and light output levels.