Description: 1. High accuracy, 10s ~ 24hour adjustable record intervals, -30 ~ +60 °C (-22℉~ 140℉) measuring range, optional external sensor -40 ~ +85 °C (-40℉~ 185℉), if external sensor is connected, temperature measuring will automatically switch to external temperature sensor. 2. Directly connect with computer for data exchange, software will automatically read data, and form reports, data can be downloaded, analyzed, exported and printed, permanent storage. 3. 16000 data recording capacity, CR 2450 battery & USB cable included for working. 4. Large LCD display to show temperature and settings. 5. Perfect for temperature recording during storage and ocean/air/highway transportation of foodstuff, medicine, and other products, especially warehousing, logistics and cold chain, such as refrigerated containers, refrigerated trucks, cold storage, laboratory, etc. Specification: - Temperature measuring range: -30 °C ~+60 °C; for optional external sensor: -40°C ~+85°C; Ambient environmental temperature: -30 °C ~+60 °C - Accuracy: -30℃~+60℃, ±0.6℃; others, ±1.2℃ - Resolution: 0.1 °C - Record capacity: 16000 points (MAX) - Record interval: 10s~24hour adjustable - Sensor: Internal NTC thermal resistor - Communication interface: USB interface - Power supply: CR2450 battery or power supply via USB interface - Size: Approx. 84 (90) x 47 (W) x 17 (H) mm (3.54 x 1.85 x 0.67 inch) How to replace battery? Rotate the battery cover clockwise to remove the battery by a coin, and rotate and tighten the battery cover counter after battery replacement. Package Includes: 1 piece Temperature data logger 1 piece Temperature Sensor 1 piece USB Cable 1 piece User Manual 1 piece Battery Note: Please allow 1-3cm error due to manual measurement, pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item, pls understand, thank you