You should know:

Obdstar X300 DP Plus A Configuration: key programmer

Obdstar X300 DP Plus B Configuration: key programmer + odometer correction tool

Obdstar X300 DP Plus C Configuration: key programmer + odometer correction tool + diagnostic tool (full kit)

Obdstar X300 DP Plus Configuration A vs. B vs. C:

http://blog.chinacardiags.com/obdstar-x300-dp-plus-configuration-a-vs-configuration-b-vs-configuration-c/

X300 DP PLUS tests:

Add a new key to VW 4^th immobilizer: success!

Pull pin codes to Peugeot X04 BSI: success!

Correct odometer Mercedes class a W169: success!

More tests will be updated here.

Credits to technicians working for http://www.chinacardiags.com/