iKross Micro-USB 2in1 OTG/SD Memory Card Reader Adapter with HDMI, USB Cable & OTG Adapter for Acer Iconia W3-810 / W3 810 8.1-Inch Windows 8 32 GB / 64 GB Tablet 2 in 1 Feature, Micro-USB to OTG USB 2.0 (usb On-The-Go) / SD Memory Card Reader Support Cellphone, Tablet which is Andriod 4.0 or above and exists OTG fuction.(the tablet's connector must be host function) Provide USB port which can connect USB Flash Disk(OTG), mouse and keyboard, etc. and 4 slots card reader support SD, MicroSD, MS & M2 Support USB data hot swap sync to PC or Smartphone / Tablet with a LED indicator. The USB HUB is not used to charge your Device, USB HUB function and card reader function can't be used at the same time