Voltage Data Logger, AC Voltage Accuracy +/-0.5 Percent, Alert Type Light, Current Channels Not Applicable, For Phase Single, Maximum AC Current Measurement Not Applicable, Maximum AC Voltage Measured 600 V AC, Minimum Operating Temperature Degrees F 14 Degrees F, Maximum Operating Temperature Degrees F 122 Degrees F, Minimum AC Current Measurement Not Applicable, Maximum Sampling Rate 64 sec, Minimum AC Voltage Measured 5 V AC, Number of Records Stored 240,000