Accucold'S Alarmkit Is A Nist Calibrated Temperature Alarm That Can Be Installed Aftermarket On Any Refrigerator Or Freezer. The Alarm Also Functions As A Thermometer, Providing A Nist Calibrated Readout Of The Minimum, Maximum, And Current Temperatures To The Nearest Tenth Of A Degree (Viewable In Celsius Or Fahrenheit). The Temperature Display Is Accurate Within /-.5 C When Operating In -10 To 10 C Ranges (And 1 C When Operated Outside That Range). The Alarm'S Temperature Sensor Is Enclosed Inside A Glycol-Filled Bottle, As Recommended By The Cdc To Ensure The Temperature Readout Better Reflects The Temperature Of Stored Contents. This Alarm Is Powered By A Replaceable Aaa Lithium Battery. The Display Screen Includes A Low Battery Alert For Added Convenience. The Alarmkit Is Calibrated In Our Iso/Iec 17025:2005 Certified Laboratory And Ships With A Certificate Of Calibration For Your Facility'S Records. This Alarm Can Be Recalibrated In Our Laboratory. Contact Us For More Information.