LogTag® TRED30-16R Refrigerator / Freezer Vaccine Data Logger with Alarm Kit Fahrenheit / Celsius -40° to 210°F (-40° to 99°C) External Bottle Probe Wall Mount Battery Operated (1073561_EA) 1/EATemperature data logger 15. 9K logs with probe and vial Built in audible alarm Up to 15. 9K recordings enough memory for 66 days at 6 minute logging Easy to read LCD display with 300 day summary in calendar format Auto pause function unplugging the external probe automatically suspends alarm and statistics processing. LogTag TRED30 16R is a CDC VFC compliant ISO IEC 17025 NIST traceable. A USB or Wi Fi cradle is required for operation.