CAR FANS C800 how to register ? Blew the detail Steps:

Step 1. check the link: http://download.znjskj.com/en
Step 2. Tap the "Register now” as shown below:

Step 3. Input your Serial number and Register password, tap "Next” to continue.

Finished

http://obd2diag.pbworks.com/w/page/127880688/CF%20C800%20Product%20description