SpectrAlert Classic

The System Sensor SpectrAlert Classic is the older version of the SpectrAlert Advance series. It consists of a red base plate (attached to the wall), a red speaker on the upper half/partial bottom half of the alarm, and a strobe light. The most common sound that is emitted when triggered is a Code 3.

Trivia

 * The alarm can be set off by fire, smoke, or a pull station.
 * The sounds emitted can be Code 3, Continuous, and others, with the most common alarm being Code 3 (3 short, loud blasts, with at least 1 second between each blast, followed by a 3-4 second silence before beginning again. The light flashes at least every 1-1.5 seconds.)
 * This is the legacy version of the Spectralert series, but this is still being used.