I had an off brand version of something like this in the past, and they can stop working after OS updates!

then offers to download a free firmware update for it (easy as touching the YES button in the popup dialog box onscreen).

I love my iPad Pro but this product price reflects Apple's pripensity to price gouge instead of simply providing inputs of various sorts, as well as, the lack of a micro SD card for a storage alternative

Works as it should if you connect an ac adapter to it it will charge while you use what ever device you are connecting

It has limitations as to what types of files you are able to transfer - but the limitations for this device are the ones caused by what Apple has imposed in their iOS software.