This combination clock/thermometer/calendar integrates a clock function, room temperature monitor and perpetual calendar all in one. Featuring easy-to-read 21/8 in. LCD digits, the unit displays time in 12-hour a.m./p.m. or 24-hour military time. It reports temperature in Celsius or Fahrenheit and shows the month, date and day of the week. Accuracy is 0.01%. Includes two AA batteries and wall mount. To assure accuracy, an individually serial-numbered Traceable® certificate is provided from an ISO/IEC 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by N.I.S.T. Dimensions: 9¼ x 10 x 1 in. Weight: 19 oz.