Hi guys:
Finally get a new update from Measy, this is new stock firmware for Measy U4B quad core tv sticks.
Now you can use your bluetooth keyboard / mouse with Measy U4B. Here is the firmware download link:
http://www.mediafire.com/download/4us5r9pyvsst6j8/u4b_update.rar
password: geekbuying.com
Any questions, feel free to contact us.
Geekbuying