A:Hello,
ThinkDiag2 is an upgraded version of ThinkDiag, which adds CANFD protocol to ThinkDiag's protocol, is compatible with more and newer GM models, and is equipped with a DB15 three-row adapter cable, convenient operation, faster communication, and diagnosis, Bluetooth is upgraded from version 4.2 to 5.0, the software will run faster and the user experience is greatly improved.
Check here for more details:
http://blog.eobdtool.co.uk/what-is-the-difference-between-thinkcar-thinkdiag-2-and-thinkdiag/

A:Hi,dear friend,
Connection is recommended when using it. Some functions may not be available or diagnostic result error without connecting network.

A:Hello,
Thinkdiag 2 only support 1-year full software function use and update, after 1-year, if you don't renew it, you can only use the basic OBDII full function.
regards,
EOBDTool.co.uk

A:Dear friend,
ThinkDiag2 only supports 12V car diagnosis, please note that if you plug it into a car larger than 12V, such as 24V, it will burn out the device and may cause a short circuit in the car, causing some damage to the car.
Best regards
Susan