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, , 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 LoggerPower supply: 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.