Alarm tracking feature:Stores in memory each alarm event detailing when the alarm state occurred, as well as when the unit returned back to within range. Alarm state indicators include visual LEDs, audio alerts, and flashing LCD segments. Data for up to 10 different alarm events can be retrieved with the most current event viewable on the display. Allows recorded data (CSV file) to be transferred from thermometer to PC or Mac using a USB flash drive (not included). No software is needed for computer interface. Each thermometer has a unique ID, allowing multiple units to be used in the same location.Datalogging features:Monitor readings overnight, on weekends, or for any time period with rolling data log. User-defined datalogging interval of one observation/minute to one observation/24 hours. Memory capacity maintains a year of recorded data when using 1-minute intervals, and longer when using larger intervals. An individually numbered Traceable® certificate is provided that assures accuracy from an ISO/IEC 17025:2005 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology).