Sensor: Built-in NTC thermistor Data Interface: USB Interface Data output: USB socket instantly related to the pc Instructions for use: lengthy press the major for more than 4 seconds, after the interface reveals ▶ sign, it ability the device transport recording. Application: It is especially used to monitor and checklist the temperature information of foods, drugs, chemicals, etc. throughout storage and transportation. It is widely used in all points of warehousing, logistics and cold chain, such as refrigerated containers, refrigerated trucks, refrigerated bags, cold storage, Laboratory etc. Type: Digital Temperature Data Logger Power supply: Built-in broad temperature CR2032 button battery or USB interface Material:ABS colour:White + Blue Package Contents: 1 x Digital Hygrometer 1 x English guide Only the above equipment content, varied products aren't included. Note: Light taking pictures and diverse exhibits may cause the color of the thing within the photograph barely assorted from the real thing. The size allowed error is +/- 1-3cm.