This Data Logger measures temperature and humidity and has a battery life of approximately 3 years. Contents include the main body of the data logger, USB cable, software installation CD, and instruction manual. The software included with the data logger allows user to download collected data to a PC for further analysis. The main body size is compact with 34 mm in length × 90 mm in width × 15 mm in height. The measurable temperature ranges from minus 40 degrees Celsius to 80 degrees Celsius, while the humidity ranges from 5 percent to 90 percent. The measurement interval can be set from 1 minute to 255 minutes.