CEM DT-172 Temperature and Humidity Datalogger You can monitor temperature and humidity values efficiently and convenienctly for long time periods by using the Datalogger. The readings are saved in the logger and simply read out by your PC with USB interface. Features: Memory for 32000 readings LCD to show some logging information easily Freely selectable measurement cycle from 1sec. to 24h Battery life: more than 3 years Download collected data through USB interface Alarm display if user-defined maximum/minimum values exceeded Analysis software used to view graph for logging data Specifications: Temp range: -40 to 70℃, -40 to 158℉ Temp Accuracy: ±1℃ Humidity range: 0 to 100%RH Humidity Accuracy: ±3.5%RH Memory: 32000(16000 each for temperature and humidity) Measuring rate: 1sec.to 24h Battery life: Typically 3 years Analysis software: Windows 98/2000/XP/Vista/7 Size(HxWxD): 94mm x 50mm x 32mm/li> Weight: 91g Package includes: Temperature and Humidity Datalogger Instruction Manual 3.6V Lithium battery (14250) Software CD USB cable Clamshell Number lock Manufacturer's Test Report.