Extech Data Logger,Temperature and Humidity Model: RHT20
Data Logger, Temperature and Humidity, Temp. Range -40 to 158 F, 0 to 100% Relative Humidity Range, Accuracy +/-1 F Temp, +/-3% RH, Battery Life 1 Year, 16,000 For Each Parameter Sample Point Storage, Digital Readout, Time Intervals 2 Seconds to 24 Hours, Alarm, Included Software Required, Special Features Dew Point Indication Via Software, User-programmable Alarm Thresholds, Interface USB, Includes Battery, Mounting Bracket with Combination Lock, USB Cable and Software and Instructions