The SA-1A provides an adjustable threshold level that activates the microphone when that level is exceeded by a sound.The unit has two sets of relay contacts for activating cameras, lights, machinery or other annunciations.

Automatic re-set is adjustable between 0.5 to 60 seconds. When used with Louroe Microphone and Base Station, the SA-1A is powered by the base station. As a stand alone unit (without a base station) 12 Vdc power is required.