Joe747

I am a NW Worldperks who often flys Delta to get WP points. I need some help on how to plug into the power outlets. On NW, it is simply a three prong connections but on Delta, there is some kind on an adoptor that I noticed people had. What exactly is it, what is it called (I am a non-techie), can I order it on line, what does it cost?

Any help much appreciated as I have a long flight on Delta coming up.

Thanks

Joe 747