Accucold Temperature Data Logger, 12-pack (individually boxed), NIST calibrated, certificate of calibration included, portable design, integrated USB, LCD display screen shows current, minimum, maximum, average, and mean kinetic temperature to nearest tenth of a degree, viewable in Celsius or Fahrenheit, .5°C accuracy in -20 to 40°C range, 3.6V lithium battery (included), low battery alert, visual alarm, records up to 32,000 data points, reusable design, user-set logging intervals, internal sensor, compatible with Windows programs, exports to PDF, Excel, or Illustrator, software included