Able to store up to 16,382 readings, Model EL-USB-1 uses replaceable lithium battery providing continuous 1 yr operation. Flashing LEDs indicate status. Clear cap protects datalogger from moisture to IP 67 standards. Configuration software allows user to set recording parameters such as logging rate, measurement units, high/low alarms, and start-time. Via USB 1.1 port, logged data can be downloaded to PC.