Check the listing for details. EXTECH 42280 Temperature and Humidity Datalogger 2TKT9. Condition: New. Listed at 347.11 USD. Data Logger, AC Voltage Accuracy Not Applicable, Alert Type Digital Display, Light, Sound, Current Channels Not Applicable, Maximum Dew Point Measured 122 Degrees F, Minimum Dew Point Measured 32 Degrees F, For Phase Not Applicable, Calibration Certificate Type Available Separately, Minimum Sampling Rate 1 sec, Maximum AC Current Measurement Not Applicable, Maximum Relative Humidity Measured 100 Percent, Maximum AC Voltage Measured Not Applicable, Minimum Relative Humidity Measured 0 Percent This Extech(R) data logger features a triple LCD that shows humidity, temperature, and date (year/month/day). Unit is programmable from keypad or PC and has a selectable data sampling rate. Model has user programmable audible/visual alarms and is ideal for displaying and logging humidity/temperature le.