Our combination clock/thermometer/ calendar integrates a clock function, room temperature monitor, and perpetual calendar all in one. Featuring easy-to-read 2-1/8" LCD digits, the unit displays time in 12-hour AM/PM 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 2 AA batteries and wall mount. To assure accuracy, an individually serial-numbered Traceable^® certificate is provided from an ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST. Dimensions: 9-1/4" x 10" x 1". Weight: 19 oz.