How to Select a Correct Key?

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Xhorse remote keys vary from these types:
Wired Remote: XK series, Packed in red, With socket, No chip, 25 bonus points for one key
Wireless Remote: XN series, Packed in blue, NXP chip, 40 bonus points. for each key
Super Remote: XE series, Packed in purple, 40 bonus points
Smart Remote: XS series, Packed in orange, Smart chip keyless go, 60 bonus points.
Benz Key: Xhorse Benz Key, 200 points for MB password calculation
XZ Smart Series  Special Remote PCB for Honda Only

How to choose a correct one for cars?

1. you can check on the key tools or xhorse app. Select Vehicle Remote
For example: I want to find a proper remote for Citroen c3 2009
then you can check the vehicle list