This is most definitely a FAKE SRT 4930 made by the Chinkos.
The SRT 4930 series do not have an RF modulator and they all have "LOOP OUT" F output below the LNB input.
The only SRT 4930 that has more than one USB is the Linux model known as SRT 4930L and its TV GUI interface is almost similar to SRT 4922.
For your guidance here are the pictures of the genuine 4930 series.
The front look is virtually the same for the 3 variations (Picture a)
Picture b is the back of the standard original version.
Picture c is the back of the version with LAN at the back.
Picture d is the back of the Linux version with 2 USB ports.
Picture e is the remote unit for all versions.