What is this for USB PORT?

there is a difference between MICRO and MINI. make sure you buy the right one.

a "micro" usb port looks like a flat "D" while a "mini" usb looks like a "D" with a rectangle coming off of it. it is about half as high as it is wide while the micro is about a quarter as high as it is wide. a mini usb is what is typically found on cameras and older phones while a micro usb is found on quite a few smartphones.