How to power it off?

[p.santos09]

Hi,
I have the OBD-II adapter 2.1...Even after I shut off the car and disconnect the Arduino power, the adapter remains up and running.
Is it possible to power it off so it doesn't drain the car battery?

Thanks,
Paul

[stanley]

It enters standby mode when no communication for 30secs.

[p.santos09]

Thank you.

Paul