We are offering usb temperature humidity data logger.compact datalogger for recording the bothtemperature / humidity. It stores up to 32, 000 readings of temperature & relative humidity. User can easily set up the logging interval, high/low alarm and start mode and download the stored data by plugging the module straight into a pcs usb port. Data downloading software is compatible towindows98, 2000, xp or vista. Status indication is via flashing red / yellow led and green led. 1. Memory of 32, 000 readings fast response and cost effective model2 freely logging interval configurable from 1sec. To 2hrs. 3 dew point indication via windows software4 selectable logging interval5 long battery life6 usb interface for set up and data download7 user programmable alarm thresholds8 start / stop logging by pressing a buttonmeasuring range -40 to 70c / 0 to 100% rhaccuracy 0.5c / 3% rhrepeatability 0.2c / 0.2%rhresolution 0.1c / 0.1% rhsampling rate selectable 2s, 5s, 10s, 30s, 1m, 5m, 10m, 30m, 1hr, 2 hr, 3 hr, 6hr, 12hr, 24hroperating temp -40 to 70cpower supply 3.6v lithium batterybattery life 1 year for 5s sample rate 2.5 year for 10s sample ratedimension 130 30 25mmweight 20 g.