The Marketlab Traceable Excursion-Trak Data Logging Thermometer is an essential tool for vaccine storage and monitoring. With a highly accurate thermometer that has a temperature range of ?58 to 158 degrees F (?50 to 70 degrees C) and resolution of 0.01, it can maintain an accuracy of +/- 0.25 degrees C across the entire temperature range. It also has a rolling memory structure to maintain the most recent 525,600 temperature observations, so you can always get an accurate reading. In addition, it stores up to 10 unique alarms and the memory can be cleared on the unit after downloading data to a USB stick. For hassle-free retrieval of data, the unit can remain in use while downloading and has low battery, memory full, USB data transfer, and active alarm state status indicators.