Data storage enables search functionality. Data can be read and printed using PC data management software. Connect directly with computer for data exchange. When connected to computer, the software reads data and forms reports. Displays temperature, time, over temperature alarm, temperature upper/lower limit, and temperature Max./Min. value on the LCD screen. Equipped with built-in sensor and optional external sensor. Powered by battery or USB cable when connected with PC. Uploads data via USB even if battery is depleted. Over Temperature Alarm and Upper/Lower Limits can be set. Records temperature data. Adjustable record interval. LCD displays data and settings. 16000 data recording capacity. Data management software and USB cable included. Data can be downloaded, analyzed, exported and printed. Auto power off and low battery indication. Includes internal temperature sensor, optional external sensor, and optional internal buzzer alarm. If external sensor is connected, temperature measuring switches to the external temperature sensor. Includes one CR 2450 battery. Battery compartment is located at the back. Specifications: Temperature measuring range: -30°C ~ +60°C (internal); -40°C ~ +85°C (optional external sensor) Ambient environmental temperature: -30°C ~ +60°C Accuracy: +/-1°C Resolution: 0.1°C Record capacity: 16000 points (MAX) Record interval: 10s ~ 24 hours adjustable Sensor: Internal NTC thermal resistor Communication interface: USB interface Power Supply: CR2450 battery or power supply via USB interface