Why does a device like this do?
This 4 in 1 OTG Pen Card Reader Ball Pen And Stylus especially made for Android system movies/pictures and documents for TF Card reading.
Feature : Portable and easy carry, transfer documents/movies or pictures either from smart phone toNB or PADs.
Combination with Stylus and Ball Pen for Smart Phone or NB.
You can get immediate support from it.