Sensor: Built-in thermistor Data interface: USB interface Data output: USB socket directly connected to the computer How to use: Long press the key for more than 4 seconds, after the interface displays the ▶ sign, it means the instrument starts recording. Application: It is mainly used to monitor and record the temperature data of food, medicine, chemicals, etc. during storage and transportation. It is widely used in all aspects of warehousing, logistics and cold chain, such as refrigerated containers, refrigerated trucks, refrigerated, cold storage, laboratories, etc. Type: Digital Temperature Data Logger Power Supply: Built-in CR2032 button battery with wide temperature or USB interface Material: ABS Color: White + Blue Package Contents: 5 x Digital Hygrometer 5 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement