Traceable dual thermometer displays the temperatures of two separate probes in degree C and degree F. Allows putting one probe in the freezer and another in the refrigerator (or measure two areas of a refrigerator). Range is -58 to 158 degree F with a resolution of 0.1 degree and an accuracy of +/-1 degree C. Displays date and time when minimum and maximum temperatures occur. Audible and visual alarm feature provides alert when temperature rises above or falls below two set points. Alarm is programmable in 1 degree increments. 3.5' micro-cable permits refrigerator doors to close on it. To assure accuracy an individually serial-numbered Traceable certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). High-impact, chemical-resistant ABS plastic case. Measures 3.5" length by 1.75" width by 1" thick. Weight is 3-2/3 ounces. Supplied with flip open stand. Velcro and magnetic strips are provided for mounting of both thermometer and bottle sensor. Supplied with a Traceable certificate and AAA battery for continuous, 1-year always-on monitoring.