Description: Directly connect with computer for data exchange, easy operation: When connected to computer, the software will automatically read data, and form reports.Only compatible with window XP (Chinese and English) and window 7 (Chinese and English 32-bit/ 64-bit) Display temperature, time, over temperature alarm, temperature upper/lower limit, temperature Max./Min. value in the LCD screen. Double sensor: Built-in Sensor and External Sensor. Used to record temperature data over a long period of time. LCD to show data and settings,32000 data recording capacity.Data management software & USB cable included for working with PC easily. Specification: Temperature measuring range: -30C +70C; Optional external sensor: -40C +85C Ambient environmental temperature: -30C +60C Accuracy: 1C Record capacity: 32000 points (MAX) Record interval: 10s~24hour adjustable Sensor: Internal NTC thermal resistor Communication interface: USB interface Power supply: CR2032 battery or power supply via USB interface Battery life: in normal temperature, if the record interval sets as 15 minutes, it could be used above one year Package Includes:(4 Pack) 1x Temperature logger 1x user manual