If you install this app, you can see your connected USB device info from this app.

Such as USB Memory, Mouse, Keyboard, LAN (Ethernet) gender, Etc ...

When you connect USB device during this app running, maybe you can see it's info.

But if your Android version lower than Marshmallow (6.0), some info will not showing.

* Please give me a mercy for English grammar error. I can't speak English well.