Original Xbox Xbox power,converter and other questions

[zlo]

Hi,
Recently I bought Xbox 1 (not 360) and i have some questions:
1. Xbox doesn't need power adapter but it goes directly to wall socket (220v). no transformer at all?Transformer is inside?
2. Is there any converter for xbox 1,so i can connect usb controller (gamepad),without using normal controller for xbox?

Thanks in advance