Simplex 4906-9154

This alarm has a SmartSync strobe.

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ADT B3407-024

ADT B3407-024

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There exists a strobe which can be attached to alarms like this.
EST 882-2B

EST 882-2B

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This unit has an electronic horn rather than an electromechanical mechanism.
Wheelock ET-1080-WS-24

Wheelock ET-1080-WS-24

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You can’t really tell from the pictures, but the strobe is practically falling out of this particular unit.
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