No idea. Since it is android based I set it for central time when I got the production sample and it constantly queries NTP to keep the time perfect.
I agree, at least I have never had a stand alone FTA STB that came with a real time clock, but this being an Android Based receiver it will keep time, once you set it to your time zone.All FTA receivers have very nasty clocks.
AzBox uses NTP if connected, works great PVR wise... even on a slow connection. I would think any "connected" device would do time this way and be reasonably accurate.