McKesson Single-Probe Datalogging Digital Thermometer, for Refrigerator and Freezer, 1 Ct

High-accuracy thermometer tested against a standard calibrated at NIST Certified, serialized, and traceable for quality assurance Customizable display shows temperature in either Celsius or Fahrenheit Min/max temperatures display with a 10-second refresh rate External bottle probe monitors temperatures Software-less reporting has minimum and maximum reading memories Data-logging thermometer records once per minute to once per 720 min Flashing and beeping alarm will activate if outside min/max temperatures Three 1.5 V Type AA batteries (or equivalent) last for about 2000 hours