Android media player CS918 with wifi and bluetooth with XBMC (kodi)

I ordered a cheap android media player from the internet and I was curious about how it works.

It is not so big it is like a mobile phone. Firstly I have to mention that the integrated video player apps are skip frames. I had to get other apps like XBMC or MX player. Secondly I bought a wireless mouse because the remote controller is hard to use. There are some problems: sometimes disappear some icons on the main screen, back button doesn't work on the same way, keyboard of kodi doesn't work with remote controller.