<https://sperdirect.com/fil/products/relative-humidity-temperature-pen-with-data-logging#product>
<http://schema.org/description>
"Records up to 32,000 data points that can be downloaded by plugging the pen directly into a USB port - no cradle or cable necessary.\nData logging can be programmed to begin immediately, at a predetermined time, activated by the unit's push-button, or to continually roll over after a set number of data points. Green and red led lights indicate data logging and alarms.\nComes with software, 3.6V ½ AA battery (3.6V ER14250), tripod screw and a wrist strap. Can also be used with an optional AC adapter #800003\n\nAir Temperature\n\nRH\n\nDew Point\n\nWet Bulb\n\n5 Year Warranty, CE, RoHS\n\n\nDimensions: 1\" × 5¼\" (25 × 133 mm)Weight: 1.2 oz (34 g)\n\n\n*Certification Option N.I.S.T. traceable Certificate of Compliance available at additional cost (Select option above).\nSpecifications\n\n\n\n \nRange\nResolution\nAccuracy\n\n\nTemperature:\n-40 to 185°F-40 to 85°C\n0.1°F or C\n±0.6°C / 0.9°F (-20 to 50°C)otherwise ±1.2°C, ±2°F\n\n\nHumidity:\n0.1 to 99.9%\n0.1%\n±5%\n\n\n\nDownloads\n   Instruction Manual\n\n\n  Product Brochure\n\n\n  Product Software\n\n\nComparison Chart\n     Comparison Chart\n\n"
<https://sperdirect.com/fil/products/relative-humidity-temperature-pen-with-data-logging>