dsv101 wrote:Its a grounding (cheater) plug: http://en.wikipedia.org/wiki/Cheater_plug
EDIT: "Cheater plugs are also used to break ground loops in audio systems.[4] This practice has been condemned as disregarding electrical safety.[4][5] An alternative is to use an isolation transformer made specifically for this purpose."
I dont even kniw how to use it wit y laptop
This thing allows you to plug a three-prong plug into a two-prong outlet. I don't see how that would help, though...