The combination of a USB 2.0 port and a Micro USB port makes this player compatible with Android smartphones and tablets supporting OTG function, as well as Micro USB charging ports of computers working with OTG function.USB plug. [works on computer] USB 2.0 SD/Micro SD card reader for data transfer.Manage all your data across multiple devices and platforms.The card reader can work on computers running Windows, MacOs and Chromeos systems. [For Android smartphones] Connect to any USB on - go (USB OTG) compatible mobile device.Play video/music directly from external storage without taking up space on your device. [Portable Plug and Play] Powered by Micro USB/USB port, no additional power required.Easy to learn, use and install without additional software installation.Thanks to its mini size, you can store it anywhere in your pocket or bag. SD + TF two cards at the same time plug-in card reader can quickly identify 2 disk characters, through a card reader can carry out two-way data conversion between 2 disk characters on the computer, reading.