Bluetooth + USB
You can always use B3 like a normal USB logger. Once finished the trip, plug into computer or mobile phone, wait for a while and you will see 2 report files created for the data.
Download the Cydiance App, connect to the device with your phone at any time when you are around it.
The device continues to work when you read data with Bluetooth, and the cold chain environment is kept stable.
You will see multiple devices working around you when you use Cydiance App.