Monarch Track-It USB Temperature Humidity Data Logger Records and Stores 64,000 Total Temperature and Humidity Readings Measurement Range of -20C to 70C (temperature) and 0 to 100% RH (Humidity) 2 Second to 24 Hour Sampling Rate 1 Year Battery Life and LED Operational and Alarm Indicators Includes Lithium Battery and Windows 10, 8, 7, Vista and XP Compatible Software (Available as a Download)