Hello, I have just purchased X6 Pro. I tried to use my iPazz wireless keyboard/mouse for easy entry on browser. I found out that when I plug in the receiver into the USB port, the wireless controller will transmit but mouse pointer will not come out. When I plug the receiver into the USB/OTG port, it works well. I am trying to get an understanding is there a difference between the 2 ports? I had used the same wireless keyboard on my older Android tv box plugged into USB port and it works well.