Features: Wide operating temperature range: -40°F to 185°F (-40°C to 85°C) Humidity range: 0 to 100% RH Records up to 16,000 readings (8,000 readings for each parameter) Use in storage containers, shipping vans, freezers and more Logs data for days, weeks or months - up to 1 year battery life Multiple 42270 dataloggers can be programmed and data downloaded from one single docking station Programmable sampling rate from 1sec to 12hrs plus Hi/Lo limits with alarm indication Program the logger, analyze and store data using Windows® compatible software View current temperature/humidity on Datalogger's LCD display Three start methods: Scheduled, immediate or magnetic Includes USB docking station with cable, 42270 Humidity/Temperature datalogger and PC software Accessories: 42270 - Temperature/Humidity Datalogger 42299 - 3.6V Litium Batteries Specifications: Temperature-40°F to 185°F (-40°C to 85°C) Humidity0 to 100%RH Datalogging Interval 1 sec to 12 hours Memory Temperature: 8000 points; Relative Humidity: 8000 points Dimensions 4.9 x 3.8 x 2" (123.8 x 95.3 x 51mm) The 42275 is a Temperature/Humidity Datalogger Kit with PC Interface. This waterproof (IP65) datalogger records up to 16,000 readings (8,000 readings for each parameter) with a date/time stamp that can be downloaded to your PC for analysis. Temperature/Humidity can be viewed on the datalogger's LCD display. Data can be downloaded from a docking station, which can add additional loggers. Programmable sampling rate from 1sec to 2hrs plus Hi/Lo limits with alarm indication. Product comes complete with docking station, software, and one 42270 datalogger with Li-Ion battery.