rezjat Yes, it is

rezjat Already asked and answerd. Mine came with additional speaker and loud sound.

rezjat sound is quite loud, so volume issue has been solved (although now there is a internal cable between both transmitter halfs that was not there in previous version, which I think allows to connect the extra speaker to the front) And yes, it comes with display protector

rezjat The TX16S has an option to select the X450, and it works almost out of the box. But tested in the air, although it works, I notice some "glitches" just in stacionary flight. The radio works flawless with other models, so I think this protocol is not perfectly implemented in opentx, and I decided to use the orginal transmitter