can any one tell me what that thing is?

I ordered Arduino Uno, but instead it got me something else I want to know if someone knows it. I'd love to hear and how to use it

https://s2.postimg.org/eezt7l09l/20170316_011321.jpg

Hi, Looks like a USB power module that produces 5V DC from a single Lithium cell.

terryking228: Hi, Looks like a USB power module that produces 5V DC from a single Lithium cell.

Agree.

Or the opposite, it may be a DC-DC converter that takes USB 5V and outputs a different voltage (like 3.3 or 9v). Who knows...

About as far removed from an Arduino Uno as you can get. If this is your first outing, do yourself a favour and get a genuine one from a decent reseller. Did the Arduino order it? It might come in useful one day.......