The Lascar EL-USB-2+ High Accuracy Temperature and Humdidity USB Data Logger Measures and Records Temperature and Humidity using an internal sensor. The logger has a measurement range of -35C to 80C (temp) and 0 to 100% RH (Humidity) with a 0.3C (temp) and 2.0% RH (humidity) accuracy. The lascar usb data loggers features a 1 year user-replaceable battery, stores up to 32,758 total temp and Humidity readings, a user-configurable sampling rate of 10 seconds to 12 hours, alarms and IP67 Rating. Plug the Logger directly into the computer's USB Port for data logger setup, configuration and download of data for analysis using the included windows software. Plug the Logger directly into the computer's USB Port for data logger setup, configuration and download of data for analysis using the windows software. The EasyLog Software is compatible with Windows 10, 8, 7, Vista and XP (32 and 64 Bit Versions) and Available As a Free Download. A 1/2 AA 3.6 Volt Lithium Battery is included with every purchase.