<<Disclaimer: Verify this information before applying it to your situation.>>

After receiving a few questions, I see I didnt made myself clear.

We plug the refrigerator into the cigarette lighter.  The frig. is about
2 ft sq. (a good size) and very effective.

You can buy it at Cosco and many other stores.  Dont forget to check if
the 120v. adapter is included, if not, you have to buy it separate.

Mireille.