This Delock OTG Dock can be connected to your Smartphones and Tablets with USB type Micro-B interface and OTG function. Thus you will get three USB A female ports and one SD card slot. Therefor you can use e.g. HDD, Memory sticks, keyboard, mouse, etc. as well as read and write SD cards. At the same time the OTG Dock serves as stand for your Smartphone or Tablet.