OM-EL-USB-2-LCD is a standalone data logger that measures and stores up to 16,379 relative humidity and 16,379 temperature readings over 0 to 100% RH and -35 to 80°C measurement ranges. The high contrast LCD can show a variety of temperature and humidity information. The OM-EL-USB-2-LCD-PLUS has the same measurement range and features with an enhanced accuracy specification. The user can easily set up the data logger and download logged data by plugging the unit into a PCs USB port and using the supplied Windows software. Data logger parameters that can be set up include data logger name, °C or °F temperature units, logging rate (10sec, 1min, 5min, 30min, 1hr, 6hrs, 12hrs), high and low alarms, immediate, delayed or push-to-start logging, display off, on for 30 seconds after button press, or permanently on, and data rollover (allows unlimited logging periods by overwriting the oldest data when the memory is full).