The McKesson triple display digital thermometer simultaneously shows the current, minimum and maximum temperatures and updates continuously. An audible and visual alarm will trigger when the temperatures go above or below the set temperatures. The minimum/maximum feature monitors critical temperatures for any period of time, such as overnight or weekends. To comply with regulatory requirements, time-stamped thermometers provide the date and time when the temperature being monitored exceeds the minimum and maximum settings in real-time. Also, an audible alarm will sound and the flashing LED will be visible. Each thermometer is certified, serialized, and traceable to NIST in Thermco's ISO17025 (Accreditation No. 69071) Calibration Laboratory and accredited by ILAC-MRA to assure accuracy and compliance with regulatory agencies.