does anyone know what this is for on the DS?

hi, i have bought a ds phat,and i had this silver thingy with it, im guessing its a docking station or something but theres a hole in it with contacts and cant see what is supposed to go into the hole...lol

maybe it isnt a docking station after all lmaoo

can you have a look and see what you think for me please?, im confused now lol

although everything was boxed this didnt come with a box so i cant look it up and theres no name on it, all it says on the little badge at the front is play on or something like that,cant see it to read it tidy.

Thanks in advance,

Desktop charger, I''d say.

Is there a place to plug the charger lead in it?


DJ OD