This datalogger has the ability to record up to 32,000 ambient temperature and relative humidity readings. Simply connect the R6030 to a computer via the included USB cable to setup parameters (sampling rate, min/max alarms) and disconnect to begin recording. The R6030 features a real-time clock with day/time stamp and LCD display to see live measurements. This product includes a calibration certficate traceable to NIST (National Institute of Standards and Technology).