Product review (3 stars): Branded under multiple names....
Updated Review:
This product is sold under multiple product names.  Since the time I wrote my original review, the branded product name that I put all my pictures and commentary against is no longer around.  Be aware that this unit alarms for both too warm and too cold and you cannot adjust the set point of those temperatures.

Original Review:
FreezerAlert is also branded at the "CDN Audio Visual Refrigerator Freezer Alarm".  There are further reviews and pictures there.

Note the unit alarms when the freezer temperature is "too low", lower than -23C/-9.4F.