Sensor: Built-in NTC thermistorData Interface: USB InterfaceData output: USB socket directly connected to the computerInstructions for use: long press the key for more than 4 seconds, after the interface shows sign, it means the instrument start recording.Application: It is mainly used to monitor and record the temperature data of foods, drugs, 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 bags, cold storage, Laboratory etc.Type: Digital Temperature Data Loggersupply: Built-in wide temperature CR2032 button battery or USB interfaceMaterial:ABScolour:White + BluePackage Contents:1 x Digital Hygrometer1 x English manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.