Strobe and speaker expander plates
System Sensor designed the SpectrAlert Advance dual strobe and dual strobe with speaker expander plates to lower cost and improve aesthetics for emergency communications system and mass notification system applications. The expander plates combine the functions of two to three notification devices on a single mounting plate and back box, and they can be easily installed by one person. These strobe and strobe speaker expander plates are designed for use in 12 or 24 V systems, and they use an amber lens strobe for private mode general utility signaling that meets Dept. of Defense specification requirements.