Sensor: Built-in NTC thermistor Data Interface: USB Interface Data Output: USB socket directly connected to the computer Instructions for Use: Long press the button for more than 4 seconds; when the interface displays a sign, the device starts recording Application: Used to monitor and record temperature data of food, chemicals, and other items during storage and transportation. Commonly used in warehousing, logistics, and cold chain applications such as refrigerated containers, refrigerated trucks, refrigerated bags, cold storage, and laboratories Type: Digital Temperature Data Logger Power Supply: Built-in wide-temperature CR2032 button battery or via USB interface Material: ABS Color: White + Blue Package Contents: 1 x Digital Hygrometer 1 x English Manual Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.