This Taylor Precision 1448 digital thermometer attaches to the inside walls of your reachin refrigerator or freezer with a suction cup. It runs on one Lithuim battery which is included. The Taylor 1448 thermometer has a unique, seethrough display and large 0.6 readout digits. The temperature range is 4 degrees Fahrenheitto 158 degrees Fahrenheit, or 20 to 60 degrees Celsius. There is a one year warranty that guarantees this product will be free from defects in material or workmanship, and on return, will be repaired or replaced at the manufacturers option without charge.