Supco TA2 Single Set Point Temperature Alarm, -10 to 80 Degrees F, 120 VAC A reliable, inexpensive alarm for refrigerators and freezers Just flip a switch to activate alarm on a rise or fall in temperature Adjustable range from -10/80 degree F 90 db audible alarm, AC adapter included Measures 3" length by 1-5/8" width by 4-7/8" height; 1 Year warranty