Features: and There are 3 types, 30 or 60 or 90 Days, choosing accoding to your needs. No cable or reader required, the USB connector enables quick connection to PCs to download data. The USB temperature data logger is super quick and easy to configure data logger, NO need to install any software. This temperature and humidity logger provides all for key information for recordings incl. alarm status, temperatures statistics (in or ) and etc. Up to 10,000 temperature points and 10,000 humidity points. Disposable USB temperature recorder is a simple and portable temperature recorder specially designed for cold chain.This product is widely used to monitor the transportation and storage process of food, medicine and chemical products. Specifications: Material: Plastic Size: 69mm or 2.72 in Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Temperature Data Logger Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.