The RTH35 is a USB Humidity, Temperature and Barometric Pressure Datalogger. Easy-to-use datalogger records Humidity and Temperature with date/time stamp. The datalogger is designed with a rugged housing and a standard USB connector where stored readings (up to 48,000 data) are conveniently transferred to a PC in PDF or Excel spreadsheet format when plugged in. Additional features include an 8-location logger bookmark, 6-language options, programmable sampling interval, adjustable alarm, and password-protected security log-in. Large LCD optimizes viewing and the smart LED provides color-coded humidity, and temperature reading status. Includes (2) CR2032 batteries, USB cover (can be used as a stand), wall mounting screw, and built-in hanger.