Supco TA7 Battery Operated Temperature Alarm, -10 to 80 Degrees F, 9V Alkaline Battery For sensitive temperature applications in remote areas, this battery operated unit is inexpensive and easy to install Alarms on rise in temperature only Adjustable range from -10/80 degree F 70 db audible alarm Measures 1-1/2" length by 1" width by 5-3/4" height; 1 Year warranty