USB Temperature Humidity Measurement Meter ABS Pen Sized Portable Thermometer Hygrometer for Indoor Outdoor Item Type: USB Temperature Humidity Measurement Meter Material: ABS Weight: Approx. 166g/5.86oz Color: As Shown Size: Approx. 12.3x3.5x2.1cm/4.84x1.38x0.83in Measuring Range: -35 Degree Centigrade to 80 Degree Centigrade, 0 Percent to 100 Percent RH Error(Typical): ±0.3 Degree Centigrade, ±3 Percent Accuracy(Typical) : 0.1 Degree Centigrade, 0.1 Percent RH Channel Number: One Temperature Channel, One Humidity Channel Storage Size: 64K Bytes, Can Store 32000 Data Sampling Rate: User Can Set the Sampling Rate from 10 Seconds to 12 Hours Start: Start Immediately; Button Start; Start at Some Point in the Future Stop Mode: Full Storage Stop; Rewrite After Full Storage; Button End; Stop After Setting Sampling Points Sampling Mode: Data Between Sampling Intervals Can Be Optionally Recorded, Including Immediate Value, Average Value, Maximum Value, Minimum Value Mode Button: Button Can Start and End the Record; Confirm and Clear LED Alarm Status; LED: Record Status Indication; Battery Status Indicator Alarm: User Can Set the Alarm Limit of Each Channel Communication: No Cable, USB Directly Connected to the Computer for Communication Computer Software: Dedicated Companion Software for Dgraph, for Setup, Data Download and Analysis, Support for Windows XP, Vista, 7, 8 Purchase by Yourself: for ER14250 1/2AA 3.6v Industrial Grade Lithium Battery with High Energy and Long Life, Which Can Be Replaced by Users. At the Same Time, USB Interface Can Also Be Directly Powered Battery Life: 1 Minute Sampling Rate About 2 Years, 10 Minutes Sampling Rate About 4 Years, Standby About 8 Years. It Depends on the Ambient Temperature and User Settings Operating Ambience: 0 Percent to 100 Percent RH, -35 Degree Centigrade to 80 Degree Centigrade (-31 Degree Fahrenheit to 176 Degree Fahrenheit) Storage Ambience: 20 Percent to 60 Percent RH, 10 Degree Centigrade to 50 Degree Centigrade (50 Degree Fahrenheit to 122 Degree Fahrenheit) Host Installation Mode: Can Be Installed on the Wall or Placed Together with the Monitored Goods