Access more USB devices and your SD card easily from your laptop, desktop or mobile device with the 3 Port OTG USB 3.0 Hub and SD Card Reader by Satechi. The hub will provide blazing fast data transfer rates through the USB 3.O port or the OTG port. The SD card holder will be truly helpful to quickly access media or any important data you store in your SD cards. To make the hub compatible with your mobile device, you have to use the OTG connection adaptor. Attach the OTG plug to the port of your mobile device and get to enjoy access of three USB peripherals. The lightweight design makes it highly portable which will not take up much of your desktop space. Those with too many USB devices, this is a hub you can make good use of.