It is OBDI to OBD2 connectors for X431 iDiag series, the software you purchased from DBSCAR website supports old car models, but the X431 iDiag main unt is only OBD2. So if you want to do car models older than 1996 year, you will need this connector set package.
X431 iDiag Connector Set Package is a one of our Launch X431Original Scanner Tools, you can buy X431 iDiag Connector Set Package from auto-obd2-tools.com.
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Go to Buy: X431 iDiag Connector Set Package