Location of model number and date code on back of smoke alarm
{"Image Artist": "Klinefelter, Elizabeth", "Image ExifOffset": "74", "Image XPAuthor": "Klinefelter, Elizabeth", "EXIF DateTimeOriginal": "2018:03:19 08:51:00", "EXIF DateTimeDigitized": "2018:03:19 08:51:00", "EXIF SubSecTimeOriginal": "90", "EXIF SubSecTimeDigitized": "90"}