Sensor: Built-in NTC thermistor Data Interface: USB Interface Data Output: USB socket directly connected to the computer Instructions for Use: Long press the key for more than 4 seconds; when the interface shows a sign, the instrument starts recording Application: Mainly used to monitor and record temperature data of foods, chemicals, and other items during storage and transportation. Widely 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 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: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3 cm.