... I have not tried using 2 slots at a time but yeah u thought I'd share it with yall.
Checking the user comments on Amazon, only one port works at a time also the USB port cannot be used for charging. There are also issues if you have your tablet in a case. I could not find any comment about the upper limit for a memory card if there is one.
It's also a mechanical nightmare. Any microUSB adapter like this is going to have to be built to grip the edge of the device, before I'll be interested. Otherwise, one accidental bump and bam, there goes your microUSB port!
That's a turn OFF for me... Imagine if you want to watch a movie from your SD card using the headphones while sitting on an air plane or anywhere. Now.. if only there were female microusb to female microusb extension cables.
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