DC plug polarity of Spitz (GL-X750)?

Hello everyone

Can someone please confirm if the polarity of the DC plug of the Spitz is the usual outside negative, inside positive or is it inverted?

Thank you in advance.

It should tell you on the sticker on the plug that goes into the mains. A dot with a circle around it with plus and minus next to them… Or lick them and see which one tingles…

Thank you. I don’t have it, otherwise I would’ve used a multimeter. That’s why I’m asking.

Inside: positive +
Outside: negative -

Thank you @alzhao. Much appreciated.

Oh, my apologies. I thought it was a situation where you’d accidentally ripped it out or cut it in half… I’ve done that. Wires should be banned.