This standalone data logger measures more than 16,000 readings over a -35 to +80°C (-31 to +176°­­F) and 0 to 100% humidity (RH) range. Easily set up the logger and view downloaded data by plugging the unit into a PC’s USB port and using the free EasyLog software provided. Data can then be graphed, printed and exported to other applications for detailed analysis. Supplied with ½ AA battery and wall mount clip. Measurement range -35°C to 80°C (-31°F to 176°F) Internal resolution 0.5°C (1°F) Accuracy (overall error) 0.55°C (1.04°F) typical (5 to 60°C) Long term stability <0.02°C (0.04°F) / year Measurement range 0 to 100%RH Internal resolution 0.5%RH Accuracy (overall error) 2.25%RH typical (20 to 80%RH) Long term stability <0.25%RH / year Logging Rate User selectable between 10 seconds and 12 hours Battery Life 3 Years Calibration Certificate Available Separately