Seller notes

OBD ll Connector 9 Volt Battery Auto Memory Keeper/Saver Much more reliable than with similar 12v outlet modelsRetains radio presets, ECM codes and learned procedures up to 2 hoursSafe voltage blocking diode installed for safe 9 volt battery useFor maintaining voltage continuity to engine computer, clock and radio memory when vehicle battery is disconnectedInstructions are included for perfect results------- Uses 9 volt battery (Not Included) For maintaining voltage continuity to engine computer...

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