Antique Strobe-Alert Model SA-100 Visual/Audio Alarm Detector
Testing Procedure: The Strobe-Alert, being a portable unit, should be tested each time it is used or moved from one location to another, but in no case less than once a month. (As stated on the label pictured) With that said it may or may not still work. Unit chirps for awhile after being plugged in.
Product may contain wear and marks consistent with age and handling. Please see photos for more details.