Koolertron (Model:QL-TYT720 Car DVD GPS Navigation Player)

Hello
I have Koolertron (Model:QL-TYT720 Car DVD GPS Navigation Player)

Link for Full Specs Info:

http://www.koolertron.com/car-dvd-gps-navigation-player-with-hd-touch-screen-bluetooth-rds-ipod-for-toyota-corolla-matrix-p-136.html?zenid=ks9h1i0klmvvja7pqt0bpqg837

Running NAV N Go

1- whats is the latest I GO Version Available that works with this unit?

2- also what is the Latest Meddil East Maps to date.

3- Thanks you for your help and support in Advance.

Any one can support please