What determines compatibility in Android phones...

[Externet]

Hi.
Is it the availability of power supply outputted at the USB port ? Is it data acceptance into the USB port ? Both ? More ?
For this gadget ----> https://www.aliexpress.com/store/pr...da2ae09&transAbTest=ae803_2&priceBeautifyAB=0

 

[(*steve*)]

It gets shocking reviews. Even the 5 star reviews make it sound bad.

Oh except for the guy who reckoned it was maybe 500 megapixels!