This compact datalogger records up to 32,000 temperature and relative humidity readings. Simply plug the R6020 directly into a computer to setup parameters (sampling rate, min/max alarms) and disconnect to begin recording. Once data collection is complete, connect again via USB to download to included software for analysis. Stores up to 16,000 temperature and 16,000 humidity readings. Simply plug into the USB port to begin downloading - no cables or wires required. User selectable sampling rate from 2 secs to 24 hrs. Visible alarm (LED) if set max/min values are exceeded. Compatible with WIndows 7,8 and 10. Wall mount bracket and screws for long-term monitoring. 5. 1" (h) x 1. 2" (w) x 1" (d). Humidity Range of 0 to 100% RH. Humidity Accuracy of + or -5. 0%: 0 to 20% & 80 to 100% ; + or -3. 5%: 20 to 40% & 60 to 80%; + or -3. 0%: 40 to 60%. Temperature Range of -40 to 158degree f (-40 to 70degree C). Temperature Accuracy of + or -2degree C (+ or -3. 6degree f): -40 to -10degree C & 40 to 70degree C (-40 to 14degree f & 104 to 158degree f); + or -1degree C (+ or -1. 8degree f): -10 to 40degree C (14 to 104degree f). User Selectable Sampling Rate of 2s, 5s, 10s, 30s, 1m, 5m, 10m, 30m, 1h, 2h, 3h, 6h, 12h, 24h. 1-year battery life for 5s sample rate, 2. 5-year battery life for 10s sample rate. Weights 20 grams. Record up to 16,000 temperature and 16,000 humidity readings, easily transfer data with integrated USB interface.